Most of the polymers we encounter in our daily lives are the six polymers listed in Table 1. To make
recycling of these polymers easier, the plastics industry has adopted the codes shown. Since compliance
in labeling is voluntary, not all plastics are labeled for identification. Identification, simply by
appearance, is difficult, however, there are a few types that are readily identifiable. Clear, colorless
containers that are used for soft drinks are most often polyethylene terephthlate (PETE). Opaque,
translucent (and often white in color) plastics used for containers such as milk cartons are usually highdensity
polyethylene (HDPE). Bottles used for shampoos or cleaning materials are usually made from
polyvinyl chloride (V or PVC). Plastic bags and some plastic wrap is often made from low-density
polyethylene (LPDE).