<1> PETE, aka PET (polyethylene terephthalate) Used for most transparent bottles, such as water, soda, cooking oil, and medicine bottles. Generally safe to use (not reuse); generally recycled.
<2> HDPE (high density polythylene) Sturdy, rigid plastic found in reusable food storage containers, milk and detergent bottles. Generally safe; generally recycled.
<3> PVC (polyvinyl chloride) Used for plastic wrap, and detergent and cooking oil bottles. Additives in PVC can increase the risk of birth defects and hormone-related cancers. Its production can be hazardous to workers and the environment. Generally not safe; not recycled.
<4> LDPE (low density polyethylene) Flexible plastic used for bags or wraps, such as produce bags and baby-bottle liners. Most number 4 plastics are not designed for reuse. Generally safe; generally not recycled.
<5> PPE, aka PP (polypropylene) Pliable plastic found in squeeze bottles, reusable food containers, and yogurt and margarine tubs. Generally safe; generally recycled.
<6> PS (polystyrene) Used in rigid take-out containers and foam meat trays. Can leach styrene when heated, a possible endocrine disruptor and human carcinogen. Not safe when heated; generally not recycled.
<7> Other; most often refers to PC (polycarbonate) This plastic is most commonly used for baby bottles, five-gallon water jugs, and reusable sports water bottles. It can leach out the hormone-disruptor bisphenol A, especially when heated. Because this group can include various other plastics, it has limited recycling potential.
