🌟SMART DESIGN--Vivid designs/colors from Luckinee, Try different colors/designs, Mix and Match to create a bright new looking for your favourite brand flask water bottle. 🌟32-40oz BOOT(3.56inch Diameter)--Designed for Hydro flask wide mouth 32oz 40oz. Extensively compatible with Owala flask freesip/twist/flip 40OZ. Do check your flask bottom diameter before ordering for your any other brand water bottle 🌟BPA FREE and SOFT SILICONE--Our flask silicone boot was made of food grade and soft silicone materials, offering enough protection for your flask from scratches, dents and dings,stealth landing. And it is a bit stretchable, easier to put on and take off. 🌟MONEY SAVING--you will get 2pc silicone boot for water bottle in one package, and try 2 different colors/designs in one package 😊SATISFACTION GUARANTEED – Try Luckinee water bottle protector boot for yourself and you will get easy/convenient customer service at any time LUCKINEE silicone boots are designed for Hydro flask wide mouth and standard mouth, made of food grade and soft silicone materials, offering enough protection for your flask from scratches, dents and dings,stealth landing. And it is a bit stretchable, easier to put on and take off. Vivid designs/colors from Luckinee, Try different colors/designs, Mix and Match to create a bright new looking for your favourite brand flask water bottle, you will get 2pc silicone boot for water bottle in one package, and try 2 different colors/designs in one package.