Some people say beans, which is wrong.
Some people say tinned toms, which I'd go with.
Other areas of debate include, toilet paper; toothpaste; washing up liquid etc.
But not only food/household items of course. What about that premium petrol you can buy? WTF? I accidentally filled up on this when about to return a hired van after moving house. I must say though, the five minute drive round the corner was well worth the extra £13.65 or whatevs.
Lets hear some more.