CONTENT - 5 Pcs Silicone Straw Covers for Stanley Cup 40 - 20 oz. WIDE COMPATIBILITY - Our straw covers are compatible with stanley cup 40 oz - 20 oz straws. Also fits all straws with an outer diameter of 0.4 inches. FOOD GRADE MATERIAL - straw covers are made of silicone, BPA free, Not only can it be decorated but also can increase children's habit of drinking more water, The perfect gift for friends and family. PROTECT YOUR DRINKS - The straw cover can seal your straw, so that it can prevent dust when not drinking, or prevent drinks from spilling during moving, especially suitable for outdoor activities. EASY TO CARRY - This straw covers is small and cute, can be carried around, Use it wherever you need it, such as walking down the street, camping, hiking or other activities.