Perfect Fit：These silicone protective boots are specially designed for Stanley Adventure Quencher 20oz tumblers Anti-slip Premium Material： Our boot for stanley cup is made of food-grade silicone, flexible and elastic, it can fit your tumbler tightly. It is reusable and easy to clean Excellent Protection：This bottom boot for Stanley can provide effective protection for the bottom of your bottle. Avoiding dents, anti-scratch, anti-slip, and reduce noise. Extend the life of expensive bottle Great Value：The package contains 4 pcs bottle tottom boots. You can share with your family. Save your money Satisfaction Guaranteed：If you're not COMPLETELY SATISFIED with our product, please feel free to contact us. Try it out and protect your tumblers 4 PCS Bottle Covers For Stanley Adventure Quencher Tumbler 40oz, 30oz, 20oz and 14oz