This canteen features a heavy weight cotton canvas cover with a BPA free, leak proof, and airtight liner which holds a 750 ml/25 oz bottle of wine. Specification: Holds a full 750 ml/25 oz bottle of wine or your favorite beverage. Our canvas canteens are made using rugged cotton canvas construction and design forward graphics. With a nod toward utility, we use rivets, grommets, and an aluminum carabiner which attaches our canteen to your belt, backpack, bike, purse, or market bag. Expels oxygen to preserve the flavor and quality of fine wine. Innovation: Unlike bottles, thermoses, or the old school ‘bota bag’, our canvas canteens can roll up and fold up when they’re not in use. So perfect for day tripping, camping, backpacking, biking, beachcombing, and just plain relaxing. Tuck it away until your next adventure! Care of 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.