Except we already have over 75% recycling rate for those items. This is solving a problem that doesn't exist.
If they were serious about the environment, they would be looking at soft plastics.
If the bottles are clean, but not sterile, wrap some alfoil round the lid and then bake them. Put them in the oven when it's cold and heat it to 170. Once it gets there hold it for 1 hr. bottles stay sterile indefinitely if the top is covered securely.
Info taken from How To Brew: Everything...