Pearl
THIS CHANGES EVERYTHING
interesting, ability to clean and keep longer is more important to me then the jet valveI took @jShort recommendation and got the polar bottles. I didn't get the other brand because the main selling point was being light weight and I don't think they had a jet valve type thing (which polar does). Polar have been good but I did find a similar science project in the valves but they were easier to clean. It is worth the cleaning once and awhile for the jet valve.