Water Pitcher Filter Refill - BWT Long-Life Refill with Mg2+ Environmentally friendly: filter cartridges can be refilled thereby contributing to waste reduction and cost savings - no more water bottles many of which end up in landfills. Uses innovative and unique Mg2+ technology that adds valuable magnesium to the filtered water and give it a remarkable taste. Convenient and economical: refill your cartridges rather then throw them way: refillable cartridges can save you money. Improves the quality of drinking water by removing chlorine, copper, lead, mercury and pesticides as well as limescale that damages kitchen appliances. Fits Brita and other popular water filter pitchers. Made by Europe's No. 1 water technology company.