Perfect compatibility, unlike most of the straw covers on the market, the size of this straw cover is designed according to the stanley tumbler, so you don't have to worry about the size not fitting. Stylish and practical: This straw topper not only looks cute, but is also practical. It prevents the straw from being contaminated by dust and spittle in the air, and also prevents mosquitoes from entering the water cup, keeps the straw and cup hygienic. Note: our straw covers is only fit for stanley large straws with a diameter of 7-8mm.Compared to the 12mm straw cap, our straw cover will not loosen when used.if you want to use it for other brands or other sizes of straws, please check the size before purchasing. Safe and healthy materials: unlike ordinary PVC material straw covers cap, our straw covers cap is made of Food-grade silicone material BPA free, and there is no unpleasant smell, you can use it without worry, cleaning it is a breeze Good choice for a gift: this stanley cup straw cover, It looks very cute, easy to put on and take off when using, the main thing is reliable quality. It is the best gift for cups lovers.Products from GuanGuan's store