This bottle is a proof that simplicity works. To keep the temperature for 3 to 4 hours this is still one of the best options. With the same inspiration of the alumna but with some minor changes, for it to have a more competitive price range. The exterior is opaque and there's foam making the isolation go from the inside to the outside. There's a soft tip so you can control the water flow and a dust cap, to make sure you drink as clean as possible. With a wide opening, it makes it more convenient to insert some ice cube's if necessary.