Horizon's response:

And here is the response I received from Horizon regarding their milk cartons. (Karen, I emailed back asking specifically about the individually packaged milk products geared toward kids... like the chocolate milk. I will let you know.)

Thank you for your recent e-mail to Horizon Organic.

We appreciate your interest in our products.

Our half-gallon and quart milk cartons are made of recyclable paperboard. The carton has a thin layer of low density, food grade polyethylene laminated to both the inside and outside of the package to prevent leaking.

Thanks again for contacting the Consumer Affairs Department.

Sincerely,Celeste MuelaConsumer Response RepresentativeRef: N549877