The Verdict Is In: Keep the Bottle Caps On

recycling plastic bottle caps

Earth911 is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for sites to earn advertising fees by advertising and linking to Earth911 also teams up with other affiliate marketing partners to help keep our lights on and the waste-fighting ideas flowing. If you purchase an item through one of the affiliate links in this post we will receive a small commission.

One of the unwritten rules of many curbside recycling programs may be on its way out.

For years, consumers have been told to remove container caps prior to recycling. But a statement released this week by the Association of Postconsumer Plastic Recyclers (APR) claims that plastic recyclers support including the bottle caps.

“We want to assure recycling coordinators, MRF operators and other collectors of recyclables that plastics recyclers will process these bottles and recover the caps for recycling purposes,” said APR Chairman Scott Saunders. He added that APR members report growing demand for the caps themselves.

To sum up that statement, you can leave the caps on your plastic bottles when recycling.

One primary issue has been that most plastic bottles are manufactured with polyethylene terephthalate (PET, or plastic #1 based on resin codes) or high density polyethylene (HDPE, plastic #2), while the cap is typically made of polypropylene (PP, plastic #5).

In plastics recycling, resins must be separated before they can be processed because they have different melting points, so caps and rings are removed.

Other factors often cited for not including bottle caps include safety issues because if the caps are left on, they can shoot off at high speeds when bottles are crushed for transport. If caps are left on and bottles aren’t crushed, it will mean fewer bottles can be transported since space will be taken up by “air weight.”

Join 24,000+ Recyclers

Here at Earth911 HQ we're all about living green and clean. If that's what you're searching for then you'll love our weekly email!

To get around this, the APR recommends that consumers crush bottles prior to putting the cap back on. The organization also says that bottles should be free of liquid, but rinsing is not necessary for recycling.

Keep in mind that even though plastic recyclers support including caps and are able to process the material, you should always follow the instructions of your local recycling program. This also does not affect glass bottle recycling, as many recyclers request that those metal lids are removed prior to recycling.

This week’s APR statement is more of a clarification on the recyclability of caps, and APR says the ideal situation would be for manufacturers to use the same resin for bottles and caps.

For those who choose to remove bottle caps and recycle them separately, Aveda offers a national cap recycling program in its retail stores.

Aveda turns its collected caps into new plastic bottle caps that can be used for Aveda products. The company recently received Cradle to Cradle certification in part because its packaging is made of up to 100 percent recycled plastic.

Related articles
360: Bottle Caps
Plastic Bottle Recycling Increases
Want to Know Where to Recycle Your Bottle Caps?

Latest posts by Trey Granger (see all)