Urinal deodorizer blocks are the chemical disinfectant blocks found in urinals. Other informal terms include "urinal mint", "urinal cake," "urinal puck" or "trough lolly (british)."

The purpose of these blocks is to disinfect and deodorize washroom urinals. Placed above the urinal drain, they deodorize the flushing water and urine upon contact. They are air-activated and slowly evaporate when in contact with the air.

They are usually cylindrical - about eight centimeters in diameter, two centimeters thick, and weigh about one hundred grams when new. This shape is the source of their more informal name, as they somewhat resemble small cakes. They are generally pink in color, although this may vary.

The chemicals composing the cake may vary. The base is commonly pure paradichlorobenzene or naphthalene. The cake's functionality is enhanced by saturating it with a scenting compound and quatenary ammonium compounds. Urinal cakes of the size listed above and made of this chemical usually last 30–60 days.

Novelty Urinal Cakes are from time to time manufactured with bull's eyes or pop-culture villains pictured upon them.

There is an advertising or promotional talking "Urinal Cake" called Wizmark. An "Interactive Urinal Communicator" providing an auto activated 15 second pre-recorded audio message or flashing lights from inside the urinal.

In popular culture

• In Bret Easton Ellis's novel American Psycho, Patrick Bateman coats a urinal cake in chocolate and presents it to his girlfriend in a Godiva box.
• The song The Ballad of Eddie Praeger by Paul and Storm is a tribute to a urinal cake written in the style of a traditional Irish folk song.
• In an episode of The Simpsons Krusty The Clown is insulted when he is hit by a urinal cake after judging a gross-out talent show.
• In an episode of Frasier, Niles Crane discovers Maris's family's fortune is from urinal cakes.
• In the movie Joe's Apartment, the main character thinks he is getting a high-profile job at Peter I. Smith Systems. It turns out to be a urinal cake company.

Toilets

Klostein | Kostka toaletowa