<P> Salt' n' Shake is one of the United Kingdom's oldest brands of potato crisp, originally manufactured by The Smith's Snackfood Company . They are most notable for containing a blue sachet containing 0.6 g of salt, allowing the purchaser to salt the crisps to their own taste . </P> <P> According to the packet, Salt' n' Shake was created by Frank Smith and was first sold in pubs in Cricklewood, London in the 1920s . Because the salt cellars he provided were being stolen by pub visitors, Smith began to sell the packets with a small blue sachet of salt, the tradition of which continues to this day . The brand is at present owned by Walkers . </P> <P> The crisps were originally called Salt' n' Shake, but were renamed Salt & Shake during the January 2003 relaunch by Walkers . The relaunch, accompanied by an advert starring Gary Lineker, introduced the crisps' latest packaging . </P>

When did salt and shake crisps come out