Crisps are traditionally a potato based snack, though they may also be available as products derived from corn and, more rarely, other root vegetables. They are sold in small packets that hold enough to eat. These days the trend is for the packets to be made of foil, rather than the more old fashioned plastic alternative.

Funnily enough, they are called crisps because of their crisp nature. This is derived from their thinness and dryness.