Newly produced Hydro Flasks do not feature a registered trademark symbol next to the logo
Durable silicon flex boot helps customize your look and protect against bumps and dings
BPA-free
Small boot fits Standard Mouth Bottles and medium boot fits Wide Mouth Hydro Flask bottles
Lifetime warranty
Make your Hydro Flask your own with a colorful, durable BPA-free silicone Hydro Flask Flex Boot. Customize your look and protect against bumps and dings. This Hydro Flask product is backed by a manufacturer's lifetime warranty.