UltraPress Covert Edition now has a boost! All bottles ship with a One-Way Valve pre-installed making it possible to add electrolytes, drink mixes and other flavored liquids directly into an UltraPress.

Drink-Mix & Electrolyte Ready! Compact, discrete, and ridiculously easy to use — the 16.9oz UltraPress® Purifier Bottle fits into any pack pocket (or cup holder), requires zero setup, and makes safe, great tasting drinking water in a mere 10 seconds (3L/min). On-the-go filtration and purification for the hiker, backpacker, camper, emergency prepper or global traveler seeking fast-flow purified water for chugging, filling hydration reservoirs, or cooking. Simply—Fill. Press. Drink.™