This portable telescopic straw is made of food grade stainless steel, the length is adjustable from 3 7/8″ to 9 1/8″, fits tumblers and cups from 12oz to 30oz. It comes with a matched telescopic brush, easily brush through the inner side of the whole telescope straw. Easy to clean and dishwasher safe. The straw can be packed into a cylindar case, which is attachable to keychain. The straw is reusable, which can replace our daily plastic and paper straw.