chamber pot -
A bowl kept in a bedroom to serve as a temporary toilet.
Wikipedia
A chamber pot (also a chamberpot, a jerry, a Jordan, a po, a gazunder, a piss pot, a potty, or a thunder pot) is a bowl-shaped container with a handle kept in the bedroom under a bed or in the cabinet of a nightstand and generally used as a urinal at night. In Victorian times, some chamber pots would be built into a cabinet with a closable cover. During the first World War chamber pots appeared in Britain with the face of the Kaiser on the inside allowing the user an additional amount of satisfaction; these are now highly collectible items.
