Materials: Reusable straws are made of food grade stainless steel to prevent scratching and rusting. Replace disposable and plastic straws to be more environmentally friendly. Easy to Clean: Each reusable straw comes with a stainless steel brush that cleans one section and leaves it open for a while in order to clean the whole straw Foldable Design: Stainless steel metal straws are retractable to fit any size of glass. Tight enough to avoid collapse. The silicone tip ensures a comfortable temperature without poking your lips while enjoying a cold or hot drink. Compact and Portable: Folds down to a fraction of its size for easy portability. Set includes 3 metal straw, 3 cleaning brush, 3 plastic sleeve, 3 silicone tip, for convenient storage. Widely Used: Stainless steel straws can be used in smoothies, iced coffee, adult drinks, etc., and can be comfortably placed in hands, pockets, car consoles, and even kitchen drawers.