During one of our household prank wars, a couple of us decided to swap a few labels around on tinned products. So very carefully, the labels were removed from a can, and swapped with another can. We had to use glue to keep the label in place, but you couldn’t tell the swap had been done.
The canned items sat in the pantry for a couple of weeks, and we forgot we had made the swap until I bumped into someone in the street a few weeks later. They said they had visited the house to collect a few items for a charity pizza evening they were hosting, and were very surprised when they opened the tin of corn and found it contained spaghetti.