A brand name of soap products owned by Procter and Gamble. Ivory was made famous because its bars of soap floated in water. The process of making soap float was a complete accident, as an employee had messed up and was leaving the soap in a certain machine too long. Soon people were sending letters saying that they dropped their soap in the shower, but were able to recover it right away because it floated unlike before. A little investigation finally turned up the cause of the floating soap, and Ivory started to market their soap as the only one that would float in water. Today they make many other products.