At Alpha Designs we focus on function over form without compromising on design. So we went back to the drawing board and developed the ultimate water bottle. The Alpha Bottle XL is made from FDA approved and 100% food-safe PET plastic, unlike a lot of similar bottles on the market. The Alpha Bottle XL features a silicone seal which ensures the Alpha Bottle XL is 100% leak-proof, combined with a heavy-duty rubber carrying strap and its huge 1600ml capacity, the Alpha Bottle XL is the ultimate accessory to keep you hydrated. Not suitable for carbonated beverages.