Standard Mouth 621ml

The 21 oz Standard Mouth from Hydro Flask (621 milliliters) is a reusable insulated bottle made of stainless steel for everyday use and outdoor activities. Thanks to its double-walled TempShield vacuum insulation, it keeps cold drinks cold for up to 24 hours and hot drinks hot for up to 12 hours - perfect for long days on the go.

The slim shape fits in most cup holders in the car or on the bike. When the cap is closed, the bottle remains leak-proof. You can easily carry it in your backpack or bag.

The bottle is dishwasher-safe and easy to clean. The Hydro Flask 21 oz Standard Mouth combines a compact format with reliable insulating performance and accompanies you throughout the day.