Stay hydrated while roughing it in the wild with the Katdyn Vario Microfilter ($90). This filtration unit features two filtering system engaged with a simple twist, including a 0.3 micron, pleated glass fiber filter used to remove waterborne bacteria and ceramic filter for pre-filtering debris from dirty water. The Vario Water Microfilter includes a replaceable carbon to reduce chemicals, toxins and odors to keep water tasting fresh.