Precisely: fit stanley large straws with a diameter of 9-10mm 0.35-0.4inch.a variety of cute straw cap decorations can be freely paired with Stanley cups, and can also distinguish between family and friends' straws.Material: unlike ordinary PVC material straw covers cap, our straw covers cap is BPA free, and there is no unpleasant smell, you can use it without worry, cleaning it is a breeze.Leak-proof: prevents the straw from entering by dust and spittle in the air, and also prevents mosquitoes from entering the water cup, keeps the straw and cup hygienic.Compact And Portable Design For On-The-Go Use. Perfect For Outdoor Activities Like Camping, Hiking, And More. Makes A Beautiful Gift For Friends And Family.Package: Sakura Flower Silicone Straw Cover Cap decoration,Good choice for a gift,this mini cup stanley cup straw cover,It looks very cute, easy to put on and take off when using, the main thing is reliable quality.Great novel gifts! for your friends or family.