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Buy.com has this 3 Pack of Eco Stainless Steel Canteens for $12.99 with free budget shipping, the lowest price we could find per canteen we could find. They are made from food-quality stainless steel, so it won't add any taste to your water. They hold 26oz of liquid and come with the cases, which help keep water cold. They also make transportation easier. Sales tax is only charged in CA, MA, MD, NY, and TN.