Heavy weight cotton canvas cover with a BPA free, leak proof, and airtight liner which holds 120 ml/4 oz of liquid. specification: Holds 120 ml/4 oz of your favorite libation. Our canvas canteens are made using rugged cotton canvas construction and design forward graphics. A 1 oz spun aluminum shot glass tops off the flask for easy sipping. Fits in your back pocket when full, folds flat when empty. innovation: Our ‘Flask and Shot Glass’ tuck into your purse, backpack, or back pocket. Just remove the shot glass, pour yourself a sip, and sit back and enjoy. Perfect for just about any occasion; use your imagination! care for canteen: Rinse the liner or use bottle brush with warm water and a bit of dish soap. Wash exterior with soap and water and let completely air dry.