The Ultrapress Purifier is the innovation in portable water filtration. Water can be filtered very quickly and conveniently, producing drinking water in just a few seconds. No other portable water filter can match the efficiency of Grayl Purifiers. In eight seconds, 500 ml of clean drinking water is produced. Anywhere in the world. Whether your water source is a hotel, a river, a lake, or a well, safe drinking water is guaranteed. The Ultrapress Purifier protects against global pathogens such as viruses, bacteria, protozoan cysts, pesticides, chemicals, and even microplastics.