MTN Products’ eco3 eco-friendly water filtration features a removable cartridge concept with three benefits. It is eco-friendly since the casing is reusable and only the filter cartridge needs replacing. It is eco-pure because the eco3 cartridge is sealed in a patented sleeve that protects it from cross contamination, and it is economical because the filter cartridges are cheaper to replace than conventional encapsulated units. Eco3 filters are NSF-certified to Standards 42 and 53.