This has reminded me of when a friend and I went to Lidl, and he kept going on beforehand about how bullshit it was that they charged for carrier bags (this being before the 5p charge across the board). He’s a bit of a Tory bellend like that.
Made a big show of grabbing a Sainsbury’s bag before we left and taking it with him. Got to the till after me, and when asked if he needed one, triumphantly declared “no thank you”, dramatically produced the bag from his pocket, opened it out with a flourish, and proceed to pack it, pay, turn to walk away, and watch everything come tumbling out of the hole in the bottom. A bottle of pasta sauce smashed and went all over his foot. I had to leave the store.
He appeared a couple of minutes later with his things in a Lidl bag.