354 ml., Colder. Hotter. Longer., TempShield. Double Wall Vacuum Insulation. Our unique insulation keeps your drink cold or hot for hours so you can stay refreshed for any adventure. Cooler Cup Configurations: cup; can cooler; bottle cooler., Dual Use Design: Works as a can or bottle cooler, or a 12 oz beverage cup. HydroFlask.com. Made in China., Designed in Bend, OR.