Yogurt pot lids.
Yeah, them foil lids that are purposely designed to not peel back in one piece. You end up with not quite a third of lid still left intact on one side of the pot of your Muller Fruit Corner, or Taiwanese equivalent. And it's always the side with the fruit thing. I hate it.
So then you spend ten minutes trying to peel the remainder of the lid off, but its difficult to get any purchase on it. And when you do manage to get hold of it, you rip another two thirds of that off, leaving you even more annoyed because it is then even more difficult to get rid of the last, tiny bit of metallic belligerence.
But it never fully comes off. No matter how hard you try, you will always end up with a tiny slither attached to what is now the edge of a buckled and dented pot with barely enough yogurt left in it to satisfy a small kitten.
I know I could eat the yogurt quite easily with the foil still attached to the pot, and you may be thinking that life really is too short to be wasting time on lid issues.
But that is not the point. I am not going to be defeated by petulant, 0.5mm thick piece of aluminum. No way.