If you have copper pots and pans or decor that you want to spiff up for the holidays, grab a bottle of ketchup (buy one at the Dollar Store, no need to buy the good stuff!). Coat your item with a layer of ketchup and let sit for about 10 minutes (place on paper towels in case of dripping). Now gently rub away with soap and water. The acids break down the discolorations leaving your copper shiny!