Since 2009, more than 500,000 empty cosmetics bottles and tubes have been returned to Kiehl's skincare stores to be recycled. When you return an empty full-sized Kiehl's bottle to any of its stores, you'll receive a stamp. Get three stamps, and you'll get a free lip balm. Earn five stamps, and you'll get a free travel-size product. Earn 10 stamps, and you can pick any full-size product (worth up to $25) as your eco-reward. Other cosmetics companies like Origins and MAC have recycling programs -- proving products that help you look beautiful can also help keep our planet stay beautiful.