They were first made in 1932 by William McDonald, a biscuit manufacturer in Glasgow. They became a brand of McVitie's when McDonald joined with McVitie's and Price, MacFarlane Lang & Co and Crawford to create United Biscuits in 1948. Each wrapper has a joke or "funny fact" printed on it and designs that feature penguins that are often in styles like that of famous works of art. These designs are usually funny.