Unlike personal water bottles, thermoses, or the ‘one time’ purchase plastic water bottle, our canvas canteens can roll up and fold up when they’re not in use. These canteens are perfect for day tripping, camping, backpacking, biking, beachcombing, and just plain relaxing. Tuck it away until your next adventure! Heavy weight cotton canvas cover with a BPA free, leak proof, and airtight liner which holds 500 ml/16 oz of liquid.. Measures 5 x 11 in.