The Lava Liquid Heavy-Duty hand cleaner helps remove unwanted dirt, residue, and bacteria from hands, contains finely ground pumice and moisturizers, and comes in a 7.5 fl. oz. pump bottle for dispensing small amounts of soap at a time. Ground pumice is a mild abrasive derived from volcanic rock to scour grease and grime from hands. This soap contains moisturizers to help keep skin hydrated. Lava, founded in 1893, is now a part of the WD-40 Company.