By now you would think that getting clean, filtered water out of a stream in the wilderness would be much easier, but that’s not the case. It’s good that the Purisoo Portable Water Purifier Bottle is changing the game. This lightweight, self-contained unit does it all. It will pump, filter, and purify your water, all in one handy water bottle. It has an integrated, replaceable filter that removes impurities at microscopic levels and lasts for 1000 liters before needing to be replaced. That means clean water anywhere at any time. It holds 13.8 ounces of water.