On an expedition through Asia, a bike tour through the Americas or while mountain climbing in Europe, you’ll always find water somewhere. However, that doesn’t always mean it’s drinkable. If you have a way to boil freshwater, do so for at least five minutes before drinking it. Or, even better and more convenient, bring a water filter to turn brackish water into drinking water. The most modern, best filters aren’t large and remove up to 99.9% of all bacteria, viruses, germs, protozoa, particles and pesticides. Many of them are small and handy and take up hardly any space in your backpack. The filter elements are made of ceramic, carbon, glass fibre, plastic or a combination thereof. A pump mechanism sends the drinkable water through a hose and filter directly to the mouth or drinking vessel.