3. Recycle cosmetics and other toiletries While shampoo and liquid soap bottles can be rinsed out and usually recycled in the curbside bin (they’re usually made of high-density polyethylene (HDPE), which is resin identification code #2), makeup compacts, upscale face-lotion bottles, and other cosmetics might be a little more challenging to recycle. Many cosmetics companies do their own take-back programs for empty compacts and makeup tubes. For the rest, Terracycle has a mail-in program (you have to pay, so you might want to try to share the cost with some similarly environmental-minded friends).