Salt 'n' Shake
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Salt 'n' Shake is one of Britain's oldest crisp brands, originally manufactured by The Smith's Snackfood Company. They are most notable for containing a blue sachet containing 0.2g of salt, allowing the purchaser to salt the crisps to their own taste.
Salt 'n' Shake were created by Frank Smith and was first sold in Cricklewood in London in the 1920s. The brand is at present owned by Walkers.