A little more hydration lets you have a little more fun. From mountain trailheads to morning yoga practice, this Hydro Flask bottle is just the right size for staying hydrated before, during and after activity. Made with 18/8 pro-grade stainless steel to ensure pure taste and no flavour transfer. TempShield™ insulation keeps beverages cold for up to 24 hours and hot for up to 12 hours.