Basically, I'm like a phone case for your water bottle. I absorb any damage that comes its way. And I look pretty good doing it, if I do say so myself. Features: Silicone cover protects your Owala Bottle from damage Fun and bright colors add a little extra personality to your bottle Dimensions: 3.6 in. D x 2.7 in. H Bottle not included Boot fits 40 oz. Stainless Steel FreeSip bottles Boot does not fit FreeSip Twist bottles