Ship-issue milkshake and toffee crispy bar
("Bodyswap", Series III)
The Brefewino version
Crispy bars are a toffee-based crispy confectionery in the Red Dwarf universe.
Crispy bars could be purchased from the vending machines of the JMC mining spaceship Red Dwarf.
When a skutter went berserk and rewired the entire ship, Dave Lister accidentally activated the Self-Destruct System by ordering a crispy bar and a milkshake. ("Bodyswap", Series III)
The Brefewino word for "catkind" was "four-legged, crispy bar snacks". ("Identity Within", Series VII)
Due to their name and wrapper, Crispy bars are clearly based on Toffee Crisp chocolate bars.
They may be related to the breakfast cereal Krispies.