A few years ago I packed few bananas in my backpack, planning to have them eaten before going through US preclearance in Toronto. I slept well on my flight to Toronto, declared them at the immigration checkpoint, expecting to abandon them. The officer asked if I had kept the stickers on it, and I had. I was surprised, and allowed to keep the bananas as the sticker showed the country of origin. Can't remember which country the bananas were from, but the USA imports bananas from there.