Plastic doesn't rust but it does get recycled. It is all a matter of supply and demand. I have a friend with a major tin collection and he has been looking for the last five years for an early plastic Co-op litre that he remembered using on the farm by the case in the 1980s. He hasn't found one yet. Maybe it is of little value to 99.9% of the collectors now but to him it is a dear memory. It is always tricky to predict the future but I am glad to be in the here and now collecting what I find and not worry about what I put into the recycle bins. Cheers, Don.