sentences:  They were first produced in 1932 by William McDonald, a biscuit manufacturer in Glasgow, and became a McVitie's brand when McDonald joined with McVitie's and Price, MacFarlane Lang & Co and Crawford to form United Biscuits in 1948.Each wrapper has a joke or "funny fact" printed on it and imaginative, often humorous designs featuring penguins that often pastiche famous works of art.During the 1980s, the Penguin brand became known for their television advertising slogan "P...P...P...Pick up a penguin!” 
  
  In October 1996, Penguins were the subject of a court case between Asda and United Biscuits, who accused Asda of passing off their own brand "Puffin" biscuits as part of the Penguin brand.