Charcoal Filters for Your Water Jugs & Bottles The Natural Filters Starter Kit contains our 5 pack of water filters, a high quality tempered glass water jug designed to house our bamboo charcoal filters as well as the filter brush. The 5 pack of bamboo charcoal water filters will provide you and your family with clean and tasty drinking water without all the nasties for over a year (15 months to be exact). That works out to be less than a dollar a week!   Naturally Plastic-Free & Biodegradable Each pack contains 5 individually wrapped Binchotan bamboo charcoal water filters which last up to 3 months each after which they can be either added to your compost or directly to your garden for a second life of enriching your soil.