The plastic bottles and cartons used for milk and juice will have substance called HDPE (HIGH-DENSITY POLYETHYLENE) made of polyolefin polymers. This material gives thick and opaque quality for the plastic. Commonly this material is present in Milk and water jugs, juice bottles, containers for detergent, shampoo and motor oil, and toys.
Limit how often you refill containers made of HDPE. It can be recycled one time into products similar to those made of recycled Code 1 plastic.
These polyolefin of contains benzophenone, a compound that mimics a female reproductive hormone estrogen and interferes with reproductive health of women.
Understand the plastic materials in the food packaging industry- visit here: http://www.healthychild.org/know-your-plastics/