My local milkman now supplies milk in returnable glass bottles. Costs a little more but saves plastic. My wife and I (and the dog) used to have 3 2litre plastic containers per week, now - none. If 2 people can save 3 plastic containers a week how much waste plastic would it save if the supermarkets sold milk in returnable glass bottles, or more people used local milkmen (or milkwomen). Just for interest in a little town like Liskeard, Cornwall we have a least two milk delivery persons delivering glass bottles so there must be a market for more in large towns.