Or really, anything you're slightly ashamed of in the housekeeping/daily living area.
I haven't cleaned out my wallet in nearly 10 years. I think there are receipts and business cards in there from 2003.
I use the same saucepan to boil my Divacup, cook veggies, make mashed potatoes and scoop my dog's food from the huge 30-lb bag to a smaller container. I have other saucepans, but this one is the perfect small size for all its functions. It's thoroughly washed with steaming hot water in between all these things, but I'm slightly ashamed of it nonetheless.