potato
plain
cheese and onion, prawn cocktail, ready salted, salt and vinegar, smoky bacon, etc.

bag, packet
a packet of smoky bacon crisps

eat

bag, packet

Crisp is used with these nouns:
air, apple, bacon, bill, drive, image, lettuce, linen, morning, pass, pastry, salad, salute, sheet, shirt, snow, vegetables