MAC Cosmetics (who have some extremely loyal users) has a great program that can merit you some free MAC lipstick of your choosing! Here is the exact wording off of their website :
“Because we share your commitment to the environment, M·A·C accepts returns of its primary packaging through the Back to M·A·C Program. By returning six  M·A·C primary packaging containers to a M·A·C counter or M·A·C Cosmetics online, you’ll receive a free M·A·C lipstick of your choice as our thanks to you.”
You can do this in the store or by mailing them in! For more information, check out the website .
Thanks Laura B for pointing this one out!