Green Toys use recycled milk containers as the main ingredient in creating their toys. Yes, the exact plastic milk jugs that you and your family drink from every day. When you finish your milk and toss the container in the recycling bin, these milk containers are collected at your curb by a local recycling company, who then sorts them from all the other types of plastic. Next, the milk containers are reprocessed into super clean fresh plastic. For you plastic geeks, the plastic material Green Toys use is called high-density polyethylene (or HDPE). This material is considered one of the safest, cleanest plastics around.