The 16.9oz UltraPress® Purifier - Nature Edition by grayl.com is the perfect way to ensure safe drinking water no matter where you are. This lightweight and easy-to-use purifier uses a three-stage filtration process to remove 99.99% of viruses, bacteria, and protozoan cysts, plus heavy metals and chemicals. With the Nature Edition, you can enjoy delicious, clean water with a hint of natural taste. Plus, it