A Small Screw You
I work in the deli and when we weigh food on the scale, it usually takes a bit off because of cup weight (usually .04lbs). Anyway, if you put the lid on, it won’t take the weight of it off, so it adds .01lbs to it. If people are being rude to me, I use this to my advantage—I just put the lid on and then print the price tag out so they have to pay a slightly extra amount of money. A very small screw you.
Story credit: Reddit / PM_ME_YURI_PLS