A staple of American cupboards for generations, Skippy peanut butter is also remarkably cheap on its home turf. Target currently sells a 16.3oz (462g) jar of Creamy for just $2.99 (£2.20).

Across the pond, Tesco charges $3.24 (£2.40) for a smaller 12oz (340g) jar, making Skippy 46% more expensive in the UK weight-for-weight. That said, Brits pay bargain prices compared to shoppers in Switzerland, who have to shell out over three times more for the product than their American counterparts.

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