591 ml. 20oz wide mouth with flex sip lid. Colder. Hotter. Longer. Let's go! 18/18. Pro-grade stainless steel. Color last coating. BPA free & toxin free. Dishwasher safe. Cold 24 hours. Hot 12 hours. TempShield: Double wall vacuum insulation. Our unique insulation keeps your drink cold or hot for hours so you can stay refreshed for any adventure. HydroFlask.com. Designed in Bend, OR. Made in China.