Doulton Water Filters, British Berkefeld
Royal Doulton is a british manufacturer of high quality ceramic water filters. Doulton Filters are usually gravity fed through one or more ceramic candles. Company has been formed in 1827 by Henry Doulton who developed ceramic water filtration process.
Doulton water filters, because they are gravity fed, are used by a variety of emergency relief organizations around the world, and also in situations where there's a potential bacteria or pathogen growth in water supply.
Ceramic filters contain traces of silver, which inhibits bacteria growth and makes the filter self-sterilizing.