I bought one of those “innocent” pure fruit smoothies at the student union this morning. The cashier said she’d give me 5% off because there was a slight dent in the bottom of the plastic bottle. I suggested that if she was willing to give me 5% off, she may as well make it 10%. So she did. If you don’t ask, you don’t get.
I popped the dent out as I walked out of the shop.