This telescopic straw is made of food grade stainless steel, the straw can be adjusted into 3 different lengths, perfect for most of cups or even bottle. Each set of metal tube comes with a brush can easily clean the inside of the straw. The straw can be placed in a plastic case after retraction, fits in your pocket, purse, backpack, or briefcase. You can also hook the straw case onto your belt. The straw is reusable and hand wash is recommended.