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Vintage Bakelite Glasses

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Glass Base Kandem Bauhaus Table Lamps
Located in London, GB
to WWII when iron was requisitioned for the war effort. Pressed glass base, Bakelite and steel
Category

1940s German Bauhaus Vintage Bakelite Glasses

Materials

Steel

Westal, Scandinavian outdoor facade lamp, copper glass, Sweden, 1960s
By Westal
Located in Forserum, SE
supports a textured clear glass shade. Inside, it is fitted with its original Bakelite lamp holder. It
Category

1960s Swedish Scandinavian Modern Vintage Bakelite Glasses

Materials

Copper

Danish Opaline Glass Chandelier From The Late 1950s
Located in Vienna, AT
Brass and bakelite frame with 8 arms fitted each with E14 socket and opaline glass shades. Made in
Category

1950s Danish Scandinavian Modern Vintage Bakelite Glasses

Materials

Brass

Vintage Chandelier with Milk Glass from Elektrosvit, 1960s
By Elektrosvit
Located in Kojetice, CZ
glass ,chrome and bakelite. The porcelain socket requires standard E27 / E27 lightbubs. New wire. The
Category

Mid-20th Century Czech Industrial Vintage Bakelite Glasses

Materials

Chrome, Iron

Beautiful Art Deco Brass and Glass Floor Lamp, 1940s
Located in Praha, CZ
- Czechoslovakia - circa 1940s - Good original condition - Polished bakelite surface on base.
Category

1940s Czech Art Deco Vintage Bakelite Glasses

Materials

Brass

Vintage Chandelier with Milk Glass from Elektrosvit, 1960s
By Elektrosvit
Located in Kojetice, CZ
glass ,chrome and bakelite. The porcelain socket requires standard E27 / E27 lightbubs. New wire. The
Category

Mid-20th Century Czech Industrial Vintage Bakelite Glasses

Materials

Chrome, Iron

Opera Glasses, Binoculars by G.Rodenstock
Located in Miami, FL
Opera glasses, binoculars by G. Rodenstock.
Category

Late 20th Century German Art Deco Vintage Bakelite Glasses

Materials

Bakelite

Green Vintage Industrial Striped Clear Glass Pendant Lights
Located in Amsterdam, NL
Green industrial pendant. Aluminum with bakelite top. Clear striped glass. Weight: 1.00 kg
Category

Mid-20th Century Ukrainian Industrial Vintage Bakelite Glasses

Materials

Aluminum

European Art Glass Globe Art Deco Chandelier
Located in Westport, CT
Rare and unusual Blown Art glass Globe Hanging Fixture,with art deco designed Bakelite Tiered tops
Category

Late 20th Century French Art Deco Vintage Bakelite Glasses

Materials

Chrome, Metal

Mid-Century Striped Glass Globe Pendant by Peill Putzler, Germany, 1970s
By Peill Putzler
Located in Barntrup, DE
Mid-Century Modern striped glass globe pendant by Peill & Putzler, Germany, 1970s. Handblown shade
Category

1970s German Mid-Century Modern Vintage Bakelite Glasses

Materials

Metal

Beautiful large original Mid Century Bauhaus opal glass ceiling lamp
Located in München, DE
Beautiful large Mid Century Modern white high-glossy opal glass ceiling lamp. Beautiful minimalist
Category

1950s European Mid-Century Modern Vintage Bakelite Glasses

Materials

Metal

Brown Purple Vintage Industrial Striped Clear Glass Pendant Lights
Located in Amsterdam, NL
Brown Purple industrial pendant. Aluminium with Bakelite top. Clear striped glass. Weight
Category

Mid-20th Century Ukrainian Industrial Vintage Bakelite Glasses

Materials

Aluminum

Art Deco Blue Glass, Brass Electric Mantle Clock, By Smiths , c1930
By Smiths English Clock Systems
Located in Devon, England
a mirrored blue glass dial. The clock as with all our clocks are fully tested and restored by our
Category

Mid-20th Century English Art Deco Vintage Bakelite Glasses

Materials

Brass

Table light model Dobrilla by Giusto Toso for Leucos, Murano glass, Italy, 1974
By Leucos, Giusto Toso
Located in Saint-Ouen-sur-Seine, FR
perspective to Murano Glass. As they concentrate on the traditional hand crafted or blown murano glass, they
Category

1970s Italian Vintage Bakelite Glasses

Materials

Art Glass, Blown Glass, Murano Glass, Bakelite

1970 s LOM Style Rounded Pillbox Wall Sconce with Large Milk Glass Shade
By LOM
Located in Los Angeles, CA
1970's large rounded milk glass flush mounted light on black Bakelite base. Can be used as a
Category

1970s Italian Mid-Century Modern Vintage Bakelite Glasses

Materials

Milk Glass, Bakelite

Mid-Century Art Deco Shaped Textured Milk Glass Wall Sconces with Frosted Band
Located in Los Angeles, CA
Mid-Century Art Deco shaped textured flush mount glass ceiling light or wall sconce with frosted
Category

Mid-20th Century Dutch Art Deco Vintage Bakelite Glasses

Materials

Milk Glass, Bakelite

Mid Century Brutalist 60s Pendant with 3 Lights in Opaline Glass Metal and Brass
Located in San Benedetto Del Tronto, IT
love for texture and contrast. Three small brass pins secure the glass to the black bakelite socket
Category

1960s Italian Brutalist Vintage Bakelite Glasses

Materials

Metal, Brass

Set of Four Stilnovo Style Glass and Brass Wall Sconces, Italy, 1960s
By Stilnovo
Located in Frankfurt am Main, DE
, brass galery with opal glass shades - the brass mounts are parcel red enameled. All four sconces in fine
Category

Mid-20th Century Italian Mid-Century Modern Vintage Bakelite Glasses

Materials

Brass

Industrial Black Enamel Lamp with Glass Cover, 1950s
Located in Kojetice, CZ
white interior, a porcelain top with bakelite box and clear glass cover.The socket requires E 27/ E 26
Category

Mid-20th Century German Industrial Vintage Bakelite Glasses

Materials

Enamel, Iron

Midcentury Glass Ceiling Lamp, Flush Mount or Wall Lamp, 1960s
Located in Praha, CZ
- circa 1960s - original condition.
Category

1960s Unknown Mid-Century Modern Vintage Bakelite Glasses

Materials

Milk Glass, Bakelite

Modernist Ceiling lamp by Hans-Agne Jakobsson, glass and metal, 1950s
By Hans-Agne Jakobsson
Located in Hägersten, SE
, Sweden. made from aluminum with a light grey lacquer, glass and brass. Original ceiling canopy in white
Category

1950s Swedish Scandinavian Modern Vintage Bakelite Glasses

Materials

Aluminum, Brass

Pair of Stilnovo Style Glass and Brass Wall Sconces, 1960s - Two Pairs Available
By Stilnovo
Located in Frankfurt am Main, DE
, brass galery with opal glass shades - the brass mounts are parcel red enameled. Both sconces in fine
Category

Mid-20th Century Italian Mid-Century Modern Vintage Bakelite Glasses

Materials

Brass

Midcentury Brass / Glass Ceiling Lamp/Flush Mount or Wall Lamp, 1960s
By J.T. Kalmar, Ars Murano
Located in Praha, CZ
- circa 1960s - good original condition - four bulbs jr.
Category

1980s Unknown Mid-Century Modern Vintage Bakelite Glasses

Materials

Bakelite, Glass

Set of 3 German Vintage Minimalist Glass Flush Mounts Ceiling Wall Lights 1960s
Located in Berlin, DE
Set of three beautiful Minimalist matte white opal glass flush mounts. Germany, 1960s. Lamp sockets
Category

Mid-20th Century German Minimalist Vintage Bakelite Glasses

Materials

Glass, Bakelite

Mid-Century Modern Brass and Green, Orange and White Glass Chandelier, 1950s
Located in Barntrup, DE
glass shade in a different color: green, white, and orange. The chandelier accommodates an E14 light
Category

Mid-20th Century Belgian Mid-Century Modern Vintage Bakelite Glasses

Materials

Brass

Midcentury Glass Ceiling Lamp, Flush Mount or Wall Lamp, circa 1960s
Located in Praha, CZ
- circa 1960s - original condition
Category

1960s Unknown Mid-Century Modern Vintage Bakelite Glasses

Materials

Milk Glass, Bakelite

pelican candy jar blown glass
Located in Buenos Aires, Argentina
pelican candy jar blown glass beautiful candy dish, very collectible motif: pelican in blown glass
Category

1940s Argentine Art Deco Vintage Bakelite Glasses

Materials

Blown Glass

Pair of Lovely Textured Ice Glass Bubble Wall Lights Sconces, 1960s
Located in Berlin, DE
Beautiful pair of textured Murano glass sconces. Austria, 1960s. Lamp sockets: 1.
Category

Mid-20th Century Austrian Mid-Century Modern Vintage Bakelite Glasses

Materials

Crystal, Metal

Extraordinary Italian Violet-Transparent Murano Glass Table Lamp from the 1960s
Located in Salzburg, AT
Wonderful table lamp made out of different materials. Mouthblown Murano glass shade with violet
Category

1960s Italian Mid-Century Modern Vintage Bakelite Glasses

Materials

Stainless Steel

Staff Chrome and Bubble Glass Hanging Lamp, 1970s, Germany
By Staff Leuchten
Located in Hagenbach, DE
bubble glass.   
Category

1970s German Mid-Century Modern Vintage Bakelite Glasses

Materials

Bakelite

Art Deco Chrome and Glass Table Lamp Some Replacement Parts
Located in Forest Row, East Sussex
holding up a white glass globe. Fully refurbished, re-chromed and re-wired Dimensions: H 46cm, W of
Category

20th Century English Art Deco Vintage Bakelite Glasses

Materials

Chrome

Vilhelm Lauritzen Brass and Opaline Glass Chandelier
By Louis Poulsen, Vilhelm Lauritzen
Located in Vienna, AT
Brass construction 6 arms fitted with original bakelite e27 sockets and opaline glass shades
Category

1950s Danish Scandinavian Modern Vintage Bakelite Glasses

Materials

Brass

Vintage Glass Wall or Ceiling Light, 1970s
Located in Kojetice, CZ
factory offices and corridors. It features a metal back and an embossed glass cover. The bakelite socket
Category

1970s Czech Industrial Vintage Bakelite Glasses

Materials

Metal

Pair of Staff Chrome and Opaline Glass Hanging Lamps, 1970s, Germany
By Staff Leuchten
Located in Hagenbach, DE
made of opaline glass.  
Category

1970s German Mid-Century Modern Vintage Bakelite Glasses

Materials

Bakelite

1970 s German Brass Wall Lamp with Glass Dome Isolator Switch IP54 Edison Bulb
By Industrial Design
Located in Leicester, Leicestershire
weighing 2kg. To replace the lamp the cage turns smoothly and detaches, this leaves the glass dome
Category

Mid-20th Century German Industrial Vintage Bakelite Glasses

Materials

Brass

Vintage Glass Wall or Ceiling Light from Elektroinstala, 1970s
By Elektroinstala Děčín
Located in Kojetice, CZ
1970s. Was used in factory offices and corridors. It features a metal back and an embossed glass cover
Category

1970s Czech Industrial Vintage Bakelite Glasses

Materials

Iron

Vintage Chandelier with Milk Glass from Elektrosvit, 1960s
By Elektrosvit
Located in Kojetice, CZ
glass ,chrome and bakelite. The porcelain socket requires standard E27 / E27 lightbubs. New wire. The
Category

Mid-20th Century Czech Industrial Vintage Bakelite Glasses

Materials

Chrome

White Opaline Glass Table Light, Opp Jihlava, Czechoslovakia 1960s
By OPP Jihlava
Located in Zohor, SK
lamp is made of two basic components, off-white bakelite base and opaline glass white shade. The shade
Category

1960s Czech Mid-Century Modern Vintage Bakelite Glasses

Materials

Opaline Glass, Plastic

Table Lamp ‘Conetto’, by Ezio Didone for Arteluce, Italy, 1990s
By Ezio Didone
Located in Stockholm, SE
Table lamp ‘Conetto’, by Ezio Didone for Arteluce, Italy. 1990s. Murano glass and bakelite
Category

1990s Italian Modern Vintage Bakelite Glasses

Materials

Murano Glass, Bakelite

VECA Hanging Lamp 1970s - Chrome Metal and Smoked Glass Space Age Design
By VECA
Located in San Benedetto Del Tronto, IT
. hanging lamp maker. Veca period. 1970s country. Italy material. chrome metal, glass, bakelite color
Category

1970s Italian Space Age Vintage Bakelite Glasses

Materials

Metal

Chanel Cuff with Emerald Poured Glass Stones
By Chanel
Located in New York, NY
Striking Chanel black bakelite bangle with emerald poured glass "stones" in gilt settings. Simple
Category

1980s French Vintage Bakelite Glasses

Materials

Bronze

Grey Industrial Factory Wall Clock from Siemens, 1970s
By Siemens
Located in Kojetice, CZ
This wall clock was produced by Siemens in Germany during the 1970s. It features a grey bakelite
Category

1970s German Industrial Vintage Bakelite Glasses

Materials

Metal

Vintage Lluminated Advertisement Coca-Cola 80s, Czechoslovakia
Located in Praha, CZ
Good original condition Case is from bakelite, picture is under glass Advertisement lights on 2
Category

1980s Czech Mid-Century Modern Vintage Bakelite Glasses

Materials

Glass, Bakelite

Art Deco Walnut Circular Vitrine Display Cabinet, English, c1930
Located in Devon, England
A wonderful 1930's Art Deco circular display cabinet of high quality, with ample storage on 3 glass
Category

Mid-20th Century English Art Deco Vintage Bakelite Glasses

Materials

Bakelite, Glass, Walnut

Coppia Di Comodini Art Decò Anni 40 In Legno Design Modernariato Mid-Century
Located in Taranto, IT
Coppia Di Comodini Art Decò Anni 40 In Legno Design Modernariato Mid-Century. Elegante coppia di comodini originali degli anni ’40, caratterizzati da un raffinato design Art Decò c...
Category

1940s Italian Art Deco Vintage Bakelite Glasses

Materials

Brass

Vintage Red Plastic Wall Clock from Prim, 1970s
By PRIM Clocks
Located in Kojetice, CZ
Vintage bakelite wall clock was made by Prim in former Czechoslovakia during the 1970s - 1980s. It
Category

1970s Czech Industrial Vintage Bakelite Glasses

Materials

Glass, Plastic, Bakelite

Vintage Brown Plastic Wall Clock from Prim, 1970s
By PRIM Clocks
Located in Kojetice, CZ
Vintage bakelite wall clock was made by Prim in former Czechoslovakia during the 1970s - 1980s. It
Category

1970s Czech Industrial Vintage Bakelite Glasses

Materials

Glass, Plastic, Bakelite

Spectacular Art Deco Walnut Display Vitrine Cabinet, English, circa 1930s
Located in Devon, England
This is a fabulous opportunity to acquire a genuinely rare design Art Deco display cabinet, this being one of the best examples in figured walnut. If you want a focal point or a wow ...
Category

Mid-20th Century English Art Deco Vintage Bakelite Glasses

Materials

Glass, Walnut, Bakelite

Art Deco Italian Pair of Matching Bedside Table Nightstands In Walnut, c1930
Located in Devon, England
A rare opportunity to acquire totally original Art Deco modernist bedside tables. Originating from Italy and dating to the early 1930s they fill both the highly desired shape of Art ...
Category

Mid-20th Century Italian Art Deco Vintage Bakelite Glasses

Materials

Brass, Chrome

Art Deco Large Copper Mirror Electric Mantle Clock by Temco, England, C1930
By Temco
Located in Devon, England
For your consideration is this very stylish large copper coloured glass chrome frame Art Deco
Category

Mid-20th Century English Art Deco Vintage Bakelite Glasses

Materials

Chrome

Poul Henningsen 3½/2 Table Lamp 1940s
By Louis Poulsen, Poul Henningsen
Located in Esbjerg, DK
Poul Henningsen PH 3½/2 with two layer glass shades. Made in bakelite, browned brass and lacquered
Category

1940s Danish Scandinavian Modern Vintage Bakelite Glasses

Materials

Brass, Copper

Art Deco Style Dome Lamp
Located in Forest Row, East Sussex
An Art Deco style dome lamp. Crimson and black bakelite and chromed metal stem with a chromed metal
Category

20th Century English Vintage Bakelite Glasses

Materials

Metal

Art Deco Style Dome Lamp
Located in Forest Row, East Sussex
An Art Deco style dome lamp. Translucent green bakelite and chromed metal stem with a chromed
Category

20th Century English Vintage Bakelite Glasses

Materials

Metal

Lifetime Las Vegas Art Deco / Mid-Century Dice Collection
Located in Van Nuys, CA
dice, small dice. all made with variety of materials ceramic, resin, wood, acrylic, glass, metal
Category

1950s American Vintage Bakelite Glasses

Materials

Bakelite

Art Deco Walnut Cocktail Cabinet, Dry Bar, English, circa 1930
Located in Devon, England
stunning, featuring a storage area for bottles at the bottom and glasses etc. at the top. The top part of
Category

Mid-20th Century English Art Deco Vintage Bakelite Glasses

Materials

Walnut, Glass, Mirror, Bakelite

Bauhaus Flush Mounts or Wall Lamps, 1940, Restored
Located in Praha, CZ
Bauhaus lights can be used as flush mounts or wall lamps. Bakelite and metal base, opaline glass
Category

1940s Czech Bauhaus Vintage Bakelite Glasses

Materials

Metal

Art Deco Stylish Mantle Clock By Smiths, England, c1930
By Smiths English Clock Systems
Located in Devon, England
This is a stunning quality made Art Deco chrome clock by the English clockmakers Smiths - it has a converted movement to quartz and is in excellent working order having been fully se...
Category

Mid-20th Century English Art Deco Vintage Bakelite Glasses

Materials

Chrome

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Vintage Bakelite Glasses For Sale on 1stDibs

An assortment of vintage bakelite glasses is available at 1stDibs. Each of these unique vintage bakelite glasses was constructed with extraordinary care, often using plastic, bakelite and metal. Vintage bakelite glasses have been produced for many years, with earlier versions available from the 20th Century and newer variations made as recently as the 20th Century. There are many kinds of vintage bakelite glasses to choose from, but at 1stDibs, Art Deco, Mid-Century Modern and Industrial vintage bakelite glasses are of considerable interest. Pragotron, Poul Henningsen and Louis Poulsen each produced beautiful vintage bakelite glasses that are worth considering.

How Much are Vintage Bakelite Glasses?

Prices for vintage bakelite glasses start at $52 and top out at $50,000 with the average selling for $621.

Materials: Plastic Furniture

Arguably the world’s most ubiquitous man-made material, plastic has impacted nearly every industry. In contemporary spaces, new and vintage plastic furniture is quite popular and its use pairs well with a range of design styles.

From the Italian lighting artisans at Fontana Arte to venturesome Scandinavian modernists such as Verner Panton, who created groundbreaking interiors as much as he did seating — see his revolutionary Panton chair — to contemporary multidisciplinary artists like Faye Toogood, furniture designers have been pushing the boundaries of plastic forever.

When The Graduate's Mr. McGuire proclaimed, “There’s a great future in plastics,” it was more than a laugh line. The iconic quote is an allusion both to society’s reliance on and its love affair with plastic. Before the material became an integral part of our lives — used in everything from clothing to storage to beauty and beyond — people relied on earthly elements for manufacturing, a process as time-consuming as it was costly.

Soon after American inventor John Wesley Hyatt created celluloid, which could mimic luxury products like tortoiseshell and ivory, production hit fever pitch, and the floodgates opened for others to explore plastic’s full potential. The material altered the history of design — mid-century modern legends Charles and Ray Eames, Joe Colombo and Eero Saarinen regularly experimented with plastics in the development of tables and chairs, and today plastic furnishings and decorative objects are seen as often indoors as they are outside.

Find vintage plastic lounge chairs, outdoor furniture, lighting and more on 1stDibs.

Questions About Vintage Bakelite Glasses
  • 1stDibs ExpertNovember 4, 2024
    To identify vintage glass, you will need to figure out if your item is between 20 and 99 years old. The easiest way to do so is first to determine the maker by looking for and then researching any markings present on the glassware. Unfortunately, vintage glass is often marked with paper and foil labels, which tend to come loose with use. As a result, experience and expertise are often necessary to accurately perform the identification process, so you may wish to have a certified appraiser or experienced antique dealer weigh in if your glassware is unmarked. Find a diverse assortment of vintage glassware on 1stDibs.
  • 1stDibs ExpertAugust 8, 2024
    To tell if glass is vintage, first look for markings, often located on the bottom or inside of glassware. By researching the mark via online resources, you can determine the maker and learn more about your piece. Any glassware produced between 20 and 100 years ago qualifies as vintage, while older pieces are antique. In the event that you can't find any markings, a certified appraiser or knowledgeable antiques dealer can assist you. Find a wide variety of vintage glassware on 1stDibs.
  • 1stDibs ExpertApril 5, 2022
    Slag glass is pressed opaque glass that has colored streaks throughout. It was used in everything from lamp shades to decorative bowls. On 1stDibs, you can find a collection of authentic slag glass pieces from some of the world’s top sellers.
  • 1stDibs ExpertSeptember 9, 2024
    To tell if glass is vintage, first look for a marking that indicates the maker. By researching the manufacturer using trusted online resources, you can learn when it produced pieces similar to yours and get a rough idea of your glassware's age. Any glass produced between 20 and 99 years ago is vintage. If you need assistance with the dating process, seek the opinion of a certified appraiser or knowledgeable antique dealer. Explore a diverse assortment of vintage glassware on 1stDibs.
  • 1stDibs ExpertOctober 24, 2024
    To tell if your vintage glasses are gold, look on the nose bridge and the temples for a purity mark. Makers often stamped their solid gold pieces with “12K,” “10K,” “14K” and other markings to identify their gold eyewear. You can research all of these markings using trusted online resources. Should you locate a "GF" mark, it is likely that your glasses are gold-filled rather than solid gold. This means that the frames are predominantly a less expensive metal but do have a thin layer of genuine gold alloy as a finish. Another mark that indicates your glasses contain some gold is "RGF." The mark stands for “rolled gold filled.” Glasses bearing this mark feature a gold-plated finish that is thinner than what's found on traditional gold-filled frames. For assistance identifying your eyeglass frame material, consult a certified appraiser or experienced antique dealer. Explore a selection of vintage glasses on 1stDibs.
  • 1stDibs ExpertAugust 20, 2024
    To tell if a glass vase is vintage, first research the maker. Look for markings on the inside and base, and then research them using trusted online resources to determine who produced your vase. By looking at when the maker was active and producing pieces similar to yours, you can typically roughly estimate its age. If your vase is between 20 and 99 years old, it is vintage. Vases that are 100 years old or older are antiques. For help with dating, consult a certified appraiser or knowledgeable antique dealer. On 1stDibs, find a collection of glass vases.
  • 1stDibs ExpertSeptember 16, 2024
    Yes, some vintage glass is worth something. Collectors are often on the hunt for pieces produced by certain makers, such as Blenko, the Culver Glass Company, Dorothy Thorpe, Libbey, Georges Briard and Arcoroc. In addition to who manufactured it, the style, type, age and condition of vintage glassware all impact the potential value. For assistance with the valuation process for pieces in your collection, enlist the help of a certified appraiser or knowledgeable antique dealer. On 1stDibs, find a diverse assortment of vintage glassware.
  • 1stDibs ExpertAugust 29, 2024
    To tell if Murano glass is vintage, it's usually necessary to conduct some online research using trusted sources. Start by looking for a maker's mark and then cross-referencing it with images published online to determine who made your piece. By learning more about the manufacturer and what they produced over the years by reading histories and exploring product catalogues, you can estimate the rough age of your piece. For Murano glass to be considered vintage, it must be between 20 and 99 years old. Older pieces are classified as antique. If you need assistance with dating your glassware, seek the help of a certified appraiser or knowledgeable antique dealer. Explore a range of Murano glass on 1stDibs.
  • 1stDibs ExpertNovember 2, 2023
    To tell if vintage Cartier glasses are real, first look for the brand's logo on the outside of the arms. It should be spelled correctly and in the French luxury fashion house's iconic gold-toned italic font. Because some vintage pieces may lack serial numbers and other markings used to identify contemporary eyewear, you may wish to enlist the help of a licensed appraiser or knowledgeable dealer for assistance with authentication. Explore a selection of Cartier glasses on 1stDibs.
  • 1stDibs ExpertApril 5, 2022
    The easiest way to tell if a bead is glass or plastic is to feel it. Glass beads will be cooler to the touch, whereas plastic beads will be closer to room temperature and warm up quickly in your hands. Another test you can perform is to listen to the sound. Glass has a distinctive ring since it’s harder whereas plastic is softer and has a duller sound. Shop a range of vintage glass bead pieces on 1stDibs.