The UltraPress® Purifier Bottle (500 ml) is compact, fun, and a breeze to use - it fits in any backpacking pocket (or cup holder), requires no preparation, and filters 500 ml of safe, great-tasting drinking water in just 10 seconds (3 l/min). On-the-go filtration for hikers, backpackers, campers or globetrotters who need fast, purified water for drinking, filling drink containers or cooking. The included filter lasts for 300 uses (150 L), after which it must be replaced. Just fill it. Press. Drink.