Technically a shift from Mylar to PET might be more environmentally friendly, but yeah I would prefer cans or cardboard box drinks, you know: the ol waxed paperboard beverage carton
Bottles are 80% more plastic than pouches and cost more. The only good part is those pouches are not usually recyclable at all and sometimes bottles get recycled.
"Sometimes" feels a bit generous. From a quick search I can find estimates that 5-9% of all plastic is recycled. It might be higher or lower depending on the specific kinds of plastic these bottles use, but most of it is probably ending up in a landfill anyways.
I was being generous. Aluminum, steel & glass are the only materials that get regularly recycled. All the others are usually trashed, even if you sent them to recycling.