The codes on plastic containers reveal whether they can be recycled and if they include chemicals that can be harmful to your health. Safe and recyclable plastics are #2-#5. Avoid using #1 PET single use water bottles and #3 vinyl or PVC products that can leach lead into foods and cannot be recycled. #6 may leach styrene, a possible carcinogen. #7 is composed of hormone-disrupting bisphenol A.