Recycle your old lipstick
I had 31 old MAC Make-up containers, you can recylce them at the MAC store and for every 6 old containers they'll give you a new lipstick! This isn't a new service, MAC has done this for years, anyway I like MAC because it's a Canadian company. If you visit their site it will tell you more about their recycling program "Back to M·A·C Program"