Glucomannan is a food additive used as an emulsifier and thickener. It is widely used as a thickener, emulsifier, and stabilizer. Store-bought canned preparations may contain tapioca starch as a thickener. Sorbitol often is used in modern cosmetics as a humectant and thickener. Tapioca powder is commonly used as a thickener for soups and other liquid foods. Sago starch can also be used as a thickener for other dishes. This starch is used in cooking for puddings, noodles, breads, and as a thickener. Sedimentation operates by passing water into a large thickener or clarifier. It also serves as a thickener for sauces, and can substitute for cornstarch. When starch is used alone as a thickener (without eggs), the result is a "blancmange". The feed is normally dosed with flocculant before delivery to the thickener. These weapons contain mustard gas mixed with a thickener, which gives it a tar-like viscosity. They are good eaten alone, or used as a thickener or sweetener in other dishes. Psyllium has been used as a thickener in ice cream and other frozen desserts. Okra is more often used as a thickener in seafood gumbos than those with meat.