Durgol Swiss Espresso Decalcifier for All Brands High-End Espresso Machines, 4.2 Fluid Ounce Bottle, 5-Pack Ten (10) 4.2 ounce bottles; decalcifier formulated to protect and care for all high-end brands of espresso machines; extends the life span of machine Works with fully or semi-automatic machines, manual machines, coffee pod or capsule machines, filter machines, tea kettles, electric water heaters Powerful, yet gentle to the machine; works 10 times faster than other decalcification processes Process is simple and safe; no unpleasant odors or taste; won't leave residue which could clog machines Environmentally safe; 100% recyclable PET bottles; made in Switzerland