A butter dish is defined as "a usually round or rectangular dish often with a drainer and a cover for holding butter at table".
[1] Before refrigerators existed, a covered dish made of crystal, silver, or china housed the butter.
[2] These butter dishes were made to hold the traditional round shape of butter at the time and came with an "ice chamber" to keep the butter cold.
[4] The water is placed into the base of the dish and the butter is put into a bell-shaped lid, creating an air seal.
[5] This article about kitchenware or a tool used in preparation or serving of food is a stub.