Caps on bottles have been a point of confusion in the recycling industry. Should caps be left on containers, thrown in the trash, or separated out? Are caps considered contamination? NRRA’s member service team would like to clear up some of these questions for members, and help you determine what the best protocol is for your facility. Caps are typically made of polypropylene, or number five plastic. Bottles and jugs are most often made of number one PET (i.e., plastic water bottles, salad dressing containers, mouthwash containers, etc.) or number 2 HDPE (i.e., milk jugs, bleach containers, etc.) plastic, being a different plastic...