A deodorizing block used as a small disinfectant in urinals.
Urinal deodorizer blocks, also known as urinal cakes, urinal mints, or urinal pucks due to their cylindrical shape, are disinfectant blocks used to reduce or mask odors in urinals. They are designed to sublimate upon receiving a dosage of liquid, often giving off a pleasant scent in the process. Urinal cakes have been known to emit potentially hazardous chemicals during their gruesome lifecycles, causing some public bathrooms to use ice instead of cakes.
Found in almost every public urinal. Cake is not free dessert; do not eat.