Actually it is a picture of mortar with pestle. The ancient mortar was pottery, so it presented "Can". It is a pictography character.
Its small seal script is
Its clerical script is
The current standard printing script is
It is a character, but it is used as a radical related to pottery, which means as long as there is 缶 in one character, it must be something related to pottery or earthenware.
Its Pinyin is Fou3.