use up the last drop

You know something else that's good for the environment?  Don't waste food or personal care products.  I was brought up to automatically let the ketchup or shampoo sit a few minutes upside down to get the last 1/2 oz or so out of the bottle, but I've encountered a lot of people who never heard of the tip.  I also use a rubber scraper to get the last bits out of cans and I try to buy jumbo sizes of items to save on packaging waste.