This might be a dumb question, but: why don't we do glass-style bottles? I live in America now, but when I used to live in Pakistan 20 years ago, I remember that I would buy pepsi or coki in a glass bottle... and if I wanted to buy a second one, I would go back to the store and give them the old empty bottle, and they would compensate me a few pennies for it -- and the bottle then is presumably washed and reused. It'…
This is based on nothing other than gut intuition and someone will probably come along and correct me.