Onoola Silicone Sleeve for Hydro Flask Water Bottles (Multiple Sizes & Colors) PERFECT FIT: Perfectly fits 24, 32 & 40oz Hydro Flask type bottles like a glove. Simply slide your flask into the silicone sleeve to use. PREVENT DAMAGE: Prevent everyday dings, dents & scratches. Perfect for the beach, rock climbing, hikes, and everyday usage! SOLID PROTECTION: Sleeve is 5mm thick at the base & 1.8mm thick around the flask, providing optimal protection. THOUGHTFUL DESIGN: Rounded square holes all around. The Onoola logo is embossed vertically for easy gripping. Designed with Aloha in Hawaii.