COMPATIBILITY - This new large bottle boot is compatible with Hydro Flask 2.0 wide mouth 64 oz water bottle, Iron Flask wide mouth 64 oz bottle, YETI Rambler 64oz bottle, ZULU 64oz, RTIC 64oz, Thermoflask 64 oz bottle, BUZIO 64 oz bottle, Coolflask 64 oz bottle, TAL 64 oz bottle, AEXPF 64 oz Bottle and more (NOTE: Does not fit Stanley 64 oz Tumbler!) 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 UPGRADE DIAMOND DESIGN - Newly upgraded diamond pattern design, create a bright new looking for your favourite flask and increas friction. 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 Diamond Silicone Boot for Hydroflask Water Bottle