COMPATIBILITY - This new large bottle boot is compatible with Hydro Flask wide mouth 64 oz water bottle ONLY HIGH QUALITY MATERIAL - Made of food-grade silicone, soft and durable, more elastic, will not be deformed, BPA free, safe for children. Easy to use, easy to clean, reusable. It is safe to take it as a dog bowl on-the-go activities MAXIMUM PROTECTION - This durable bottom sleeve helps protect against dents, dings, and damage. Give your cup and tumbler a longer life. It's the perfect cup tumbler accessory for your active, on-the-go lifestyle SIMPLE DESIGN - Simple solid color design, very versatile for your various colors of cups. Warning: silicone boot only, flask water bottle is excluded BETTER SERVICE- Any questions, please contact us, we will reply within 10 minutes during working time