Unknown Decorative Bowls
to
100
375
335
5
19
109
207
380
23
94
58
5
8
5
2
11
39
30
11
5
151
121
27
14
8
6
6
3
1
1
1
1
196
180
170
143
113
445
207
479
225
110
104
92
Height
to
Width
to
715
344
411
164,601
134
132
113
88
Creator: Unknown
Murano Glass Sculptural Leaf Bowl with Bullicante
Located in Warrenton, OR
Murano Glass Sculptural Leaf Bowl with Bullicante - medium to light mauve/violet color. (looks a darker on dark backgrounds). Possibly a Barovier
Toso piece.
This is a uniquely...
Category
Mid-20th Century Italian Mid-Century Modern Unknown Decorative Bowls
Materials
Glass, Murano Glass, Blown Glass, Art Glass
19thc Set of Three Yellow Ware Bowls
Located in Los Angeles, CA
19th century yellow ware mixing bowls. Wonderful color with a white stripe going across the top and each has a beautiful blue design within th...
Category
19th Century American Adirondack Antique Unknown Decorative Bowls
Materials
Pottery
$1,960 Sale Price / set
20% Off
Large Antique Chinese Export Porcelain Bowl Famille Rose Hand Painted C-1770
Located in Katonah, NY
This exquisite 18th-century Chinese export porcelain bowl was hand-painted during the Qianlong era, circa 1770, using colored enamels in the Famille Rose palette.
Pink peonies in ful...
Category
1770s Chinese Chinese Export Antique Unknown Decorative Bowls
Materials
Porcelain
Monumental Antique Hand Carved Wooden Trough or Bowl Wabi Sabi, 19th Century
Located in Meer, VAN
Monumental antique carved wooden trough or bowl, 19th century.
This is a rare antique hand carved wooden trough or bowl, which can be used for decoration or as a (fruit) bowl or mag...
Category
19th Century European Folk Art Antique Unknown Decorative Bowls
Materials
Wood
Pearlized Oval Decorative Pierced Edge Capiz Catchall or Trinket Dish
Located in Oklahoma City, OK
An unusual pearlized capiz shell trinket dish or catchall. We've never come across anything similar to this beautiful plate. It is oval in shape and...
Category
20th Century American Art Deco Unknown Decorative Bowls
Materials
Shell
$187 Sale Price
25% Off
Pink Carved Italian Marble Stone Pedestal Bowl with Scalloped Edge - Italy
Located in Oklahoma City, OK
A beautiful carved circular pink stone marble fruit bowl which sits upon a pink stone pedestal base. With gorgeous veining in pale pinks and whites, this decorative bowl will add the...
Category
20th Century Italian Art Nouveau Unknown Decorative Bowls
Materials
Stone
$675 Sale Price
25% Off
Pair of Chinese Jun Ware Bowls, Yuan Dynasty
Located in Houston, TX
Pair of Chinese Jun ware bowls, Yuan dynasty (circa 1250-1400): Large Jun Yao, purple splashed stone ware bowl Yuan Dynasty, China. Well potted, on a neatly cu...
Category
15th Century and Earlier Chinese Antique Unknown Decorative Bowls
Materials
Porcelain, Stoneware
$2,800 / set
Art Deco Beige Marble Glass Bowl Catchall, European Vintage 1930s
Located in Nuernberg, DE
Beautiful Art Deco footed bowl with two dove handles.
Cream with beige details, marble look.
Manufactured by STS -Sjedinjene Tvornice Stakla (United Glass Factories)
This factory was...
Category
1930s Serbian Art Deco Vintage Unknown Decorative Bowls
Materials
Art Glass
Mid-Century Modern Florence Thomas Enamel Bowl
Located in Chula Vista, CA
For your consideration, a mid-century modern Florence Thomas enamel bowl. Made in Pasadena California. USA circa the 1960s. Retain original label from the maker. White color with wit...
Category
1960s American Mid-Century Modern Vintage Unknown Decorative Bowls
Materials
Metal
19Thc Original Blue Painted Small Wood Bowls -Pair
Located in Los Angeles, CA
19Thc Original blue painted dough or butter bowls with amazing surface.They have been waxed so there is a bit of shine to them. Sold as a pair.
Category
Late 19th Century American Adirondack Antique Unknown Decorative Bowls
Materials
Wood
$1,180 Sale Price
20% Off
Art Deco Black and Clear Glass Condiment Set Vintage Europe, Sweden, 1930s
Located in Nuernberg, DE
Gorgeous glass set of salt and pepper shakers with a mustard pot on a glass tray. A beautiful art Deco item. Found on a estate sale in Malmo, Sweden. A nice addition to any table.
Category
1930s Swedish Art Deco Vintage Unknown Decorative Bowls
Materials
Glass
Czech Art glass bowl by ladislav Palecek
Located in Delft, NL
Czech Art glass bowl by ladislav Palecek
Category
1980s Czech Mid-Century Modern Vintage Unknown Decorative Bowls
Materials
Art Glass
Large Antique 19th Century Moroccan Polychrome Footed Ceramic Bowl from Fez
Located in Bad Säckingen, DE
This exquisite 19th-century Moroccan ceramic bowl from Fez showcases traditional craftsmanship with its vibrant polychrome decoration. The bowl features an intricate geometric and floral design rendered in shades of deep blue, green, and yellow, characteristic of Fez pottery...
Category
19th Century Moroccan Tribal Antique Unknown Decorative Bowls
Materials
Ceramic, Pottery, Terracotta
Rustic Swedish Turned Bowl
Located in Houston, TX
Rustic Swedish turned bowl circa 1880-1909.
Note: Due to regional changes in humidity and climate during shipping, antique wood may shrink and/or ...
Category
Late 19th Century Swedish Rustic Antique Unknown Decorative Bowls
Materials
Wood
Bowl Made From Porcelain
Hand Painted, Of Japanese Origin From 1940s
Located in Lejre, DK
This porcelain bowl of Japanese origin, dating from around the 1940s, is a fine example of traditional Japanese craftsmanship and artistry. The bowl features intricate hand-painted ...
Category
1940s Danish Other Vintage Unknown Decorative Bowls
Materials
Porcelain
Moroccan Ceramic Plate Adorned with Silver Filigree from Fez
Located in Moreno Valley, CA
Handcrafted large Moroccan polychrome decorative ceramic plate from Fez. Bleu de Fez, very nice designs hand painted by artist in Fez.
Geometrical and floral designs and adorned wit...
Category
Early 20th Century Moroccan Moorish Unknown Decorative Bowls
Materials
Ceramic
19Thc Dough Bowl With Handles
Located in Los Angeles, CA
19Thc Hand carved dough bowl with handles and found in New England. This bowl has an amazing patina and surface.
Category
Late 19th Century American Adirondack Antique Unknown Decorative Bowls
Materials
Wood
$556 Sale Price
20% Off
Charcoal Diogenèa Bowl by ZPS Studio
Located in Geneve, CH
Charcoal Diogenèa Bowl by ZPS Studio
Dimensions: D 23 x H 4.8 cm
Materials: Charcoal.
A number of 31 bowls of identical shape, made in limited edition by fine Italian artisans in 31...
Category
2010s Italian Post-Modern Unknown Decorative Bowls
Materials
Stone
$370 / item
19Thc Original Red Painted Dough Bowl
Located in Los Angeles, CA
19Thc Original Red painted dough bowl or trencher is in fine condition.This early trencher bowl was found in New England.
Category
Late 19th Century American Adirondack Antique Unknown Decorative Bowls
Materials
Wood
$760 Sale Price
20% Off
Polypore Medium Bowl by David Valner
Located in Geneve, CH
Polypore Medium Bowl by David Valner
Dimensions: D 27 x W 30 x H 18 cm.
Materials: Hand-crafted glass.
Weight: 3,5 kg.
Finish: Medium size, Dark green and beige, and matte surface.
...
Category
2010s Czech Post-Modern Unknown Decorative Bowls
Materials
Glass
$1,135 / item
Antique Bohemian Ruby Flashed Crystal Pedestal Bowl with Deer and Forest Scene
Located in Bad Säckingen, DE
This exquisite antique Bohemian crystal pedestal bowl showcases masterful craftsmanship with its deep ruby flashed glass intricately wheel-cut and etched to reveal a charming woodlan...
Category
Late 19th Century Czech Bohemian Antique Unknown Decorative Bowls
Materials
Crystal, Enamel
Ceramic Bowl Chinese Celadon Ware Crackle Glaze Mid-Century Modern
Located in Chula Vista, CA
For your consideration, a ceramic bowl, likely a piece of Chinese celadon ware, characterized by its distinctive crackle glaze and decorative woven bamboo or rattan wrapping. possibl...
Category
1950s Mid-Century Modern Vintage Unknown Decorative Bowls
Materials
Pottery, Rattan
Polypore Small Bowl by David Valner
Located in Geneve, CH
Polypore Small Bowl by David Valner
Dimensions: D 22 x W 27 x H 13 cm.
Materials: Hand-crafted glass.
Weight: 2 kg.
Finish: Small size, dark green and beige, and matte surface.
In t...
Category
2010s Czech Post-Modern Unknown Decorative Bowls
Materials
Glass
$860 / item
Mid-Century Decorative Bowl, Czechoslovakia, 1960
s
Located in Praha, CZ
Made of resin.
Manufacturer Ruch Liberec, Czechoslovakia.
Good original condition.
Category
1960s Czech Mid-Century Modern Vintage Unknown Decorative Bowls
Materials
Resin
19thc Hand Carved Dough Bowl
Located in Los Angeles, CA
This hand carved bowl was found in Canada and is in good condition with hand carved handles.Nice aged patina and no cracks.
Category
Mid-19th Century American Adirondack Antique Unknown Decorative Bowls
Materials
Wood
$716 Sale Price
20% Off
IKaros Hand Painted Carnations and Tulips Decorative Plate Rhodes Greece
By Iznik Pottery
Located in Moreno Valley, CA
A decorative I Karos pottery, I Caro collector polychrome hand painted and handcrafted in Rhodes, Greece ceramic wall decorative plate with an antelope, carnations and tulip polychrome design.
The plate is decorated with a white, blue, aqua, green, and sienna red design and gilded with 24-karat gold.
These are intricately, hand painted plates made in Rhodes, Greece by the famous I Caro pottery.
Rhodes is famous for its kiln products, such as tiles and pottery, which are glazed and multicolored.
It has a beautifully hand painted carnation and tulip in burgundy, light and dark blue and turquoise foliage.
An Islamic ceramic plate in the Iznik style, painted in vivid colors with decoration of tulips and carnations.
The back of the plate is signed and numbered, it has a string to the back for hanging. It is marked
“handmade in Rhodes Greece by Ikaros Pottery...
Category
Mid-20th Century Greek Greek Revival Unknown Decorative Bowls
Materials
Ceramic, Porcelain
19Thc Original Blue Painted Dough Bowl From New England
Located in Los Angeles, CA
This amazing hand carved folky original blue painted dough bowl is in fine condition and super rare color to find.The blue paint is undisturbed and super patina.It was found in New E...
Category
1870s American Adirondack Antique Unknown Decorative Bowls
Materials
Wood
$1,836 Sale Price
20% Off
Murano Art Glass Lime Green and Clear Bowl Catchall Italy, Sommerso, 1970s
Located in Nuernberg, DE
An amazing Venetian Murano glass object in an unusual design and a pretty beautiful lime green and clear color. A highly decorative piece useful as center piece, bowl, candy bowl or ...
Category
1970s Italian Mid-Century Modern Vintage Unknown Decorative Bowls
Materials
Art Glass
$368 Sale Price
20% Off
Large Chinese Sang de Boeuf Bowl, 20th Century, Signed
Located in Doylestown, PA
Large patinated Chinese Sang de Boeuf with Flambe glazed bowl, signed, early 20th century. A heavy, thick-bodied earthenware bowl with great color likely used for utilitarian purpose...
Category
Early 20th Century Chinese Primitive Unknown Decorative Bowls
Materials
Pottery, Earthenware
Murano Glass Opaline Yellow Bowl with Gold Polveri/Fleck
Located in Warrenton, OR
Murano Glass Opaline Yellow Bowl with Gold Polveri/Fleck. The finer polveri gives the item a sort of pearlescent look, especially on the exterior. It is hard to show that in the pho...
Category
Mid-20th Century Italian Mid-Century Modern Unknown Decorative Bowls
Materials
Gold Leaf
Mid-Century Modern Pottery Bowl by Tue Poulsen for Tue Keramik, 1960s
Located in Hamburg, DE
Mid-Century Modern Danish Studio Pottery Bowl by Tue Poulsen for Tue Keramik, 1960s, in Very Good conditions. Designed 1960 to 1969. This piece has an attribution mark.
Additional i...
Category
20th Century Danish Mid-Century Modern Unknown Decorative Bowls
Materials
Earthenware
Signed, Vintage Art Glass Bowl, White with Blue, Green,
Earthy Mauve
Located in Warrenton, OR
Signed, Vintage Art Glass Bowl, White with Blue, Green,
Earthy Mauve.
This is a very pretty asymmetrical bowl designed to tilt slightly.
It is signed on the bottom. We're not ...
Category
Mid-20th Century Unknown Mid-Century Modern Unknown Decorative Bowls
Materials
Glass, Art Glass, Blown Glass
Large Exceptional Norwegian Burl Birch Bowl, ca 1780–1830
Located in Farsta, SE
Large Exceptional Norwegian Burl Birch Bowl, ca 1780–1830
It’s hard to do this magnificent bowl justice through photos alone.
The beautiful fire burl birch pattern and silky-smooth...
Category
1780s Norwegian Scandinavian Modern Antique Unknown Decorative Bowls
Materials
Birch, Burl
O
Connor Bowl by Fakasaka Design
Located in Geneve, CH
O'Connor bowl by Fakasaka Design
Dimensions: W 41.5 cm D 16 cm H 9.5 cm.
Materials: dark bronze.
FAKASAKA is a design company focused on pro...
Category
2010s Brazilian Modern Unknown Decorative Bowls
Materials
Bronze
$1,888 / item
19Thc Original Painted Dough Bowls in Blue
Red
Located in Los Angeles, CA
19Thc Original painted hand carved dough bowls in amazing blue & red surface.These painted bowls came from a private collection. Both in very good condition.
These bowls are in very ...
Category
1840s American Adirondack Antique Unknown Decorative Bowls
Materials
Wood
$3,116 Sale Price / set
20% Off
19thc Sponge Lidded Crock
Located in Los Angeles, CA
19thc Sponge lidded crock with light blue hand painted sponge design. Crock is in greet condition with wear from age and use.
Category
Late 19th Century American Adirondack Antique Unknown Decorative Bowls
Materials
Pottery
$476 Sale Price
20% Off
Middle Eastern Islamic Brass Bowl with Egyptian Scene
Located in Moreno Valley, CA
Middle Eastern Islamic Egyptian metal bowl hand-etched and hammered brass.
Early 20th century Egyptian Arabian brass vessel bowl.
Engraved and hand-chased repousse with Egyptian arabesque...
Category
Early 20th Century Egyptian Islamic Unknown Decorative Bowls
Materials
Brass
Large Nordic Folk Art Hand-Carved Wooden Dough Bowl, Finland, 19th Century
Located in Karis, Nyland
A rare and expressive example of Northern European folk craftsmanship, this oversized wooden dough bowl was hand-carved in 19th century Finland from a single block of solid hardwood,...
Category
Late 19th Century Finnish Folk Art Antique Unknown Decorative Bowls
Materials
Wood, Birch
$3,060 Sale Price
20% Off
19thc Mocha Yellow Ware Seaweed Bowl
Located in Los Angeles, CA
This rare green yellow ware mocha seaweed bowl is in pristine condition. The sage green color is very good.
Category
19th Century American Adirondack Antique Unknown Decorative Bowls
Materials
Pottery
$780 Sale Price
20% Off
CLEARANCE SALE Vintage Murano Glass Bowl / Vide-Poche with Copper Aventurine
Located in Warrenton, OR
CLEARANCE SALE Vintage Murano Glass Bowl / Vide-Poche with Copper Aventurine.
Good vintage condition. We found no chips or cracks.
It measures approximately 7.25 x 6.25 x 2 inches.....
Category
Mid-20th Century Italian Mid-Century Modern Unknown Decorative Bowls
Materials
Copper
Murano Art Glass Pink and Clear Bowl Object Vintage, Italy, Sommerso, 1970s
Located in Nuernberg, DE
An amazing Venetian Murano glass object in an unusual design and a pretty beautiful pink and clear color. A highly decorative piece useful as center piece, bowl, candy bowl or catcha...
Category
1970s Italian Mid-Century Modern Vintage Unknown Decorative Bowls
Materials
Art Glass
19thc Butter Crock With Lid
Located in Los Angeles, CA
19thc Blue and white sponge butter crock. beautiful pattern on this sponge ware crock. Spells butter in front of the crock. The lids sits on top of the bowl.
Wonderful age.
butter...
Category
Late 19th Century American Adirondack Antique Unknown Decorative Bowls
Materials
Pottery
$556 Sale Price
20% Off
Lotuso Green Ceramic Decorative Bowl by Simone
Marcel
Located in Geneve, CH
Lotuso Green Ceramic Decorative Bowl by Simone & Marcel
Dimensions: D 31 x W 31 x H 8 cm.
Materials: Ceramic.
Different marble and ceramic options available. Custom options available on request. Please contact us.
Our mission is to encourage people to make their home the best place to be, to get inspired and to receive friends and family. Designed and manufactured by ourselves, we offer lightings to help people creating distinctive living spaces. Enhancing the authenticity of natural and organic materials using associations and contrasts. Extreme quality behind a facade of ultra-minimalism. We find our materials to the source to ensure we give the best value...
Category
2010s Spanish Post-Modern Unknown Decorative Bowls
Materials
Ceramic
19th Century Large Pantry Box with Lid
Located in Los Angeles, CA
19th century pantry box with lid in good condition. Found in New England in good condition.
Category
19th Century American Adirondack Antique Unknown Decorative Bowls
Materials
Wood
$716 Sale Price
20% Off
Grand Tour French Bronze Tazza With Rose Marble Base
Located in New York, NY
Amazing 19th century French bronze tazza with rose marble base, in vintage original condition with some wear and patina due to age and use, there is some wear to the marble and minor...
Category
1890s French Mid-Century Modern Antique Unknown Decorative Bowls
Materials
Carrara Marble, Bronze
Rod Bowl by Fakasaka Design
Located in Geneve, CH
Rod bowl by Fakasaka Design
Dimensions: W 19.5 cm D 19.5 cm H 3.5cm.
Materials: dark bronze.
Rod bowl / ashtray / centerpiece / candle holder / ca...
Category
2010s Brazilian Modern Unknown Decorative Bowls
Materials
Bronze
$1,458 / item
19th Century Hand Carved Dough Bowl
Located in Los Angeles, CA
This fine hand carved dough bowl with double handles and in fine as found condition.There are no cracks or damages.
Category
19th Century American Adirondack Antique Unknown Decorative Bowls
Materials
Wood
$788 Sale Price
20% Off
Mid-Century Modern Teak Fruit Bowl or Basket
Located in Waddinxveen, ZH
Beautiful and practical fruit basket made of teak wood from the 1960s. Probably of Scandinavian origin. This basket has a simple geometrical shape, design and timeless and made of na...
Category
1960s Scandinavian Mid-Century Modern Vintage Unknown Decorative Bowls
Materials
Teak
1970 Crystal Arte Space Age Italian Design Blue Glass Bowl
Located in Brescia, IT
Blue Crystal Bowl
Crystal Arte
Italy, 1970
Curved Crystal Bowl
Sticker Label Manufacture
Perfect Condiction
Category
1970s Italian Mid-Century Modern Vintage Unknown Decorative Bowls
Materials
Crystal
Austrian Bronze Mortar and Pestle, Original Patina, Pharmacy or Herbalist
Located in Nuernberg, DE
Offered is a beautiful antique solid brass mortar and pestle set. The mortar has a cylindrical shape with a flared mouth and two angular handles at the sides. The baton-shaped pestle...
Category
1920s Austrian Hollywood Regency Vintage Unknown Decorative Bowls
Materials
Metal, Brass
19th Century Sponge Ware Pottery Mixing Bowl
Located in Los Angeles, CA
This large mixing bowl is most unusual and the size is very large. Great as a fruit bowl. Condition is very good.
Category
19th Century American Country Antique Unknown Decorative Bowls
Materials
Pottery
$716 Sale Price
20% Off
Sponge Ware Butter Crock 19thc Hand Made
Located in Los Angeles, CA
19thc hand made and hand painted butter crock with a lid. 19tthc blue and white sponge pattern with the word butter across the middle of the crock. Beautiful hand made pottery.
Category
19th Century American Adirondack Antique Unknown Decorative Bowls
Materials
Pottery
$760 Sale Price
20% Off
Antique 19th Century Hand-Painted Lobed Paper Mache Dish Fruit Motif Wabi Sabi
Located in Bad Säckingen, DE
Charming antique 19th-century papier-mâché dish featuring a beautifully scalloped, lobed form and richly hand-painted decoration. The warm ochre-orange ground is adorned with a repea...
Category
1880s French Chinoiserie Antique Unknown Decorative Bowls
Materials
Lacquer, Paper
Post Modern Czechoslovakian Art Glass Orange Bowl
Located in Chula Vista, CA
For your consideration, a decorative post-modern art glass bowl in orange and black colors. Fantastic sculptural Czechoslovakian design. Stamped underneath.
Dimensions: 2.75" H x 11...
Category
1980s Czech Post-Modern Vintage Unknown Decorative Bowls
Materials
Blown Glass
Large 18th Century Swedish Wabi-Sabi Hand-Carved Dough Bowl with Spoon
Located in Stockholm, SE
A large and heavy hand-carved wooden dough bowl from 18th to early 19th century Sweden, showcasing the beauty of wabi-sabi through its raw texture, asymmetrical lines, and timeworn p...
Category
18th Century Swedish Folk Art Antique Unknown Decorative Bowls
Materials
Oak
Light Pink Murano Glass Ashtray by Barbini
By Alfredo Barbini
Located in Stamford, CT
Large midcentury Murano glass ashtray by Barbini. Light pink with all-over bullicante (controlled bubbles) and gold flecks.
Category
1960s Italian Hollywood Regency Vintage Unknown Decorative Bowls
Materials
Blown Glass
Sommerso Amber
Green Murano Art Glass Fruit Bowl 1970s Italy
Located in Nuernberg, DE
Magnificent midcentury Murano Art Glass with astonishing color shades going from amber into green. This piece was produced in Italy during the 1970s or older.
This wonderful piece is...
Category
1970s Italian Mid-Century Modern Vintage Unknown Decorative Bowls
Materials
Art Glass
Red, Yellow, Green,
Clear Bollicine Murano Glass Bowl /Vide-Poche
Located in Warrenton, OR
Red, Yellow, Green,
Clear Bollicine Murano Glass Bowl /Vide-Poche
This rainbow-reminiscent mid-century modern era Murano art glass dish / bowl measures approximately 6 x 5 x 1...
Category
Mid-20th Century Italian Mid-Century Modern Unknown Decorative Bowls
Materials
Glass, Art Glass, Blown Glass, Murano Glass
Bronze Murano Glass Ashtray by Barbini
By Alfredo Barbini
Located in Stamford, CT
Large midcentury Murano glass ashtray by Barbini. Bronze and white glass with all-over gold flecks.
Category
1960s Italian Hollywood Regency Vintage Unknown Decorative Bowls
Materials
Blown Glass
Danish Mold Blown Glass Condiment Bowl with Four Sections
Located in Los Angeles, CA
Danish mold blown glass condiment bowl with four sections. In original condition with visible scratching. Wear is consistent with its age and use.
Category
1960s Danish Mid-Century Modern Vintage Unknown Decorative Bowls
Materials
Glass
Unknown decorative bowls for sale on 1stDibs.
Unknown decorative bowls are available for sale on 1stDibs. These distinctive items are frequently made of stone and are designed with extraordinary care. There are many options to choose from in our collection of Unknown decorative bowls, although brown editions of this piece are particularly popular. We have 336 vintage editions of these items in-stock, while there is 364 modern edition to choose from as well. Many of the original decorative bowls by Unknown were created in the modern style in europe during the 21st century and contemporary. Prices for Unknown decorative bowls can differ depending upon size, time period and other attributes — on 1stDibs, these items begin at $34 and can go as high as $16,000, while a piece like these, on average, fetch $861.
Creators Similar to Unknown
Questions About Unknown Decorative Bowls
- 1stDibs ExpertSeptember 9, 2024Yes, paintings by unknown artists may be worth something in some cases. When a painting’s maker isn't a well-known artist or is completely anonymous, factors like the visual appeal, historical significance, previous ownership and condition will determine the value of a painting. A certified appraiser or experienced art dealer can evaluate your piece using these criteria and provide you with an estimated value for your art. Shop a wide range of paintings on 1stDibs.