- Standard Mouth 1.81 in. opening fits the Hydro Flask Sport Cap and Standard Mouth Flex Cap.
- With its double-wall vacuum insulated TempShield technology liquids remain hot up to 6 Hours and cold up to 24 Hours.
- All Hydro Flasks are made of non-toxic BPA-free plastics & 18/8 stainless steel food-grade stainless steel.
- Thanks to the proprietary powder coat your bottle stays slip-free making it easy to go wherever you do.
- Fits in most automobile cup holders and bicycle bottle racks.