Hydro Flask 21 Oz Standard Flex Straw Cap Oat
- Drink in the adventure. A little more hydration lets you have a little more fun. From mountain trailheads to morning yoga practice, our Standard Mouth bottle is just the right size for staying hydrated before, during, and after activity. Our largest Standard Mouth available uses TempShield™ double wall vacuum insulation to keep your water refreshingly ice cold for up to 24 hours. Plus, it resists condensation, so the sides of your bottle stay dry.