[byteCoder]

In elementary school in Wisconsin in the 70s, we lost our milk cartons in favor of the bagged milk.

Although it may have been sold as eco-friendly, the real driving reason was cost reduction: it was less expensive to package and transport milk in plastic bags than in small waxed cardboard cartons.

[timbit42]

Bags are more environmentally friendly than cartons or jugs, even if the bags are landfilled and the jugs and/or cartons are recycled.

Source: https://theconversation.com/milk-jugs-cartons-or-plastic-bag...