Water Pitcher Filter Refill - BWT Vitalis Refill with Mg2+ (3) Packets enable BWT water pitcher cartridges to be refilled and reused. Unique Mg2+ technology adds valuable magnesium to the filtered water and gives it a remarkable taste. Filter granules Improve the quality of drinking water by removing chlorine, copper, lead, mercury and pesticides as well as limescale that damages kitchen appliances. New and unique refill technology helps you to avoid waste and save msoney. Environmentally friendly: refillable filters help to reduce usage of water bottles, many of which end up in landfills.