12. Your bra
Fork it over, sister.
A growing number of makeup manufacturers (like MAC) recycle their packaging and accept returns. If you're not sold on this idea, here's an incentive: many give out free lipsticks or other products in return for a set number of returned packages.
Want to know what you can and can't recycle in your neck of the woods? Contact your local recycling company to get information. If you have questions about a specific item they don't handle, they can refer you to an organization that does.