Yes, Urinal Blocks, designed to deodorize the urinals (where you can often find them), are also called urinal cakes, urinal mints, urinal pucks, or urinal cookies.
These are usually cylindrical tablets. The purpose of these blocks is to clean and to deodorize restroom urinals. Urinal blocks are placed into a bowl, above the urinal drain.
Blocks are often placed in a small plastic trap known as a Urinal Screen that prevents their loss down the drain when they dissolve to a small size.
They come in a variety of colors, shapes and sizes, and weigh from about 20 grams up to about 100 grams.
Housechem, Inc. produces paradichlorobenzene-free urinal blocks that are made from surfactants, enzymes, and fragrances which in addition to battling the smell of urine also offer an active cleaning efficacy.