A combination toliet / lavatory (sink) found in
prison cells.
Often called a, "suicide-resistant
prison comby" or, "ligature-resistant prison comby" because the toliet portion has no seat and only a small amount of water is present in the
bottom of the bowl after flushing it -- this helps to prevent inmates from attempting to drown themselves or getting their heads between the seat & bowl.
Sometimes they are simply called an aluminum thunderflush because they flush quickly and loudly.