Re: Milk in Bags?
Used to be quite common in the UK - decades ago. I seem to remember UHT coming in plastic bags. That was in the days when normal milk came in glass bottles, before they invented plastic.
The main dairy in my home town switched to plastic bags in the late 60s, and got loads of complaints - not about the bags, but because people were no longer being woken by the early morning clinking of glass bottles, so ended up late for work.