PERFECT FIT: Designed to fit 12–24 oz Wide and Standard Mouth bottles, 32 oz Travel Bottle, and 32–40 oz Travel Tumblers. DURABLE SILICONE MATERIAL: High-quality silicone construction provides long-lasting protection and a secure grip. ENHANCED FUNCTIONALITY: Improves stability and prevents sliding on surfaces for everyday convenience. EASY TO CLEAN: Dishwasher safe and simple to remove for hassle-free maintenance. EXTRA PROTECTION FOR YOUR BOTTLE: Hydro Flask Small Bottle Boot shields your bottle from bumps and dings for added durability.