The Katadyn MyBottle Purifier, the only EPA-registered Purifier, is a convenient alternative to pump-style water purifiers and filters. Just dip and sip - the easiest, most convenient way to treat your water. Cushioned mouth piece folds flat to prevent leaking. Prepare clean drinking water anytime and everywhere. Just fill the bottle and drink without pumping. Perfect for small amounts when hiking, traveling, or exploring! The 3-phase water filter has the highest safety level and eliminates bacteria, protozoa (Giardia, cryptosporidium), plus kills 99% of waterborne viruses, as determined under the U.S. EPA. The ViruStat purification cartridge purifies water on demand (no waiting). Treats up to 26 gallons (100 liters) per replacement cartridge, depending on water quality. 24 oz. bottle after cartridge displacement. Dimensions: 10" x 3". Wt. 8 oz.