Why do so many tinned foods – in Britain, at least – come in cylindrical 400g cans? Who decided that 400g is the perfect amount of beans/tomatoes/custard? Nanci Preston, Solihull
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Presumably, it was originally 1lb (454g), and at the time we switched from imperial to metric units the manufacturers seized the chance to make the tins 12% smaller while keeping the price the same. Shasarak
It looks like a slow transition from imperial to metric measurement with a side of inflation.
When I was a kid, Heinz baked beans were sold in 16oz cans….