From mountain trailheads to morning yoga practice the Hydro Flask Standard Mouth 24 oz Insulated Stainless Steel Water Bottle with Screw Cap 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.