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.

The Tim Tam, produced by Arnott's in Australia and first sold in 1964, was based on the Penguin.

[2] Occasional media references include tongue-in-cheek debates over which is the superior biscuit.

[6] United Biscuits had been criticised for continuing to use trans fatty acids in the cream filling of Penguins.

[7] By December 2007, United Biscuits began to advertise the absence of trans fats from Penguins, having removed the ingredient from this product line.