Introducing Wave Hydration Bladders.  Designed to fit snugly into our Thirst Trap Hydration Pack or Flatlander Daypack, our bladder is made from premium TPU material that is BPA-free and soft to the touch, it's also much easier to clean. We kept things clear on this model so you can actually tell when it's clean or not too. This sucker has a 2L capacity that will keep the water flowing on longer rides or hikes.