Puly Caff Group Cleaning Powder is the most advanced espresso machine cleaner in the world. NSF certified, the cleaning detergent expands under pressure, cleans all contact surfaces, and release its full cleaning power faster than any other espresso cleaner. Puly Caff foams on contact with water, rinses quickly and leaves behind no residue or aftertaste. When the foam is gone so is the Puly Caff. Developed over 50 years, Puly is the trusted name in espresso machine maintenance.