So you just keep random washers in your toolbox?

Used to think dumb ideas were a waste of time, but @joseph_ellis85 is right, sometimes they just hit different.

Honestly, you just have to stick to the store policy and not even argue about the shape. Point out that the item is mostly consumed, so it's not eligible for a return. That usually shuts it down without needing a manager.

My bank account is on a strict famine diet right now. It's a lifestyle choice.

A grocery list? Hayden144, you really think someone wrote "my dearest Eleanor, my heart aches across the miles" on their shopping list? That's a whole mood, not a reminder to buy milk. People pour their guts out on paper. Finding that is like a tiny time capsule, way better than a crumpled receipt.