Use the ultraviolet light rays in a safe way to sterilize clear water. All you need is the SteriPEN Ultra Portable Water Purifier. It can purify 16 ounce of water within a minute and destroy up to 99.99% protozoa, bacteria and even viruses. The purifier can be used up to 8000 times and you’ll get up to 40 treatments per charge. It can ideally fit any store-thought bottle of water where you just have to insert it in the bottle, flip the bottle upside down and start treating it. Water purification made easy.