Flip it and sip it with the Hydro Flask 21oz (621 ml) Standard Mouth Bottle With Flex Straw Cap. With a comfortable, flexible handle, the closeable, leakproof straw cap is easy to open and close with one hand, for on-demand hydration. 

Double-wall insulation keeps drinks cold up to 24 hours for cool refreshment. The slim design fits most cupholders and is dishwasher safe.

 Hydro Flask will keep water icy cold until the end of your morning run, provide refreshment after a yoga class and serve up piping hot spicy chai after a long day.

• Up to 24 hours cold, up to 12 hours hot
• TempShield® double-wall vacuum insulation
• Leakproof when closed
• Durable stainless steel
• Dishwasher safe
• Flex Straw Cap not intended for use with hot liquids
• Not for use on a stove, in a microwave or freezer
• Lifetime warranty against manufacturing defects