The Covers Set comes 7 pieces of the differnet cute animal design. They help to distinguish different people's straws. 10mm 2/5inches Straw Covers: Straw Tip Covers are suitable for all types of straws with an outer diameter of 10mm (0.4inches), compatible with Stanley 30&40 oz tumbler straw. Note: Straws cups and straws are not included.The Anti-dust Straw Caps Reusable Straw Topper has a strip that can be fixed on the straw, Straw Tip Covers can always hung on the side of the straw after opening the cover, it will not be lost. Usage of the Silicone Straw Toppers :dust proof, splash proof, debris proof,cup's decor .The straw toppers for stanley cups are well compatible with Stanley Cups 40 oz & 30 oz drinking straws, also suitable for other straws with an external diameter of 8-10 mm.The straw caps for stanley cups can seal your straw, so that it can prevent dust when not drinking, or prevent drinks from spilling during moving. Easy to Clean, The reusable straw caps and flexible which can be both cleaned by hand or in the dishwasher, natural drying.The cute Silicone Animal Straw Cover Caps are good gift for friend or family , this mini cup Stanley cup straw cover looks very cute, easy to put on and take off when using.