OverviewColorful protection.Make your Hydro Flask your own with a colorful, durable silicone Flex Boot. Customize your look and protect against bumps and dings.Small boot fits 12-24 oz wide and standard mouth bottles.Product BenefitsRemovable, silicone boot adds extra protection to your Hydro FlaskSmall boot fits 12-24 oz wide and standard mouth bottlesBPA-FreeLifetime Warranty