177 ml. BPA free/leakproof. Great for the Outdoors: Host's Easy-Fill Flask carries 6 oz of your favorite beverage. Our proprietary closure snaps into place and locks liquids inside while the hinged lid ensures easy cleaning and refilling. Simply slide the portable flask into your backpack, pocket or on a carabiner clip, and you're outfitted for any rugged adventure. Leakproof seal. Hinged design for easy filling & cleaning. Tethered cap for easy drinking. Dishwasher safe. hoststudios.com. Designed in Seattle - made in China.