Plastic water bottle caps are color coded based on the type of water ... doesn't account for flip-top or "sport caps," which often have different colors from standard twist-off bottles.

At recycling facilities, bottles are separated from labels and from caps, which are made from a third type of plastic. While labels are technically recyclable, some facilities don’t have the ...

You may have ... caps are also one of the most common items consumed by marine animals. Made with a more buoyant type of plastic, bottle caps also travel further across oceans than the bottles ...