Since 1989, six-pack rings have been manufactured to be 100% photo-degradable, so the plastic will begin to disintegrate in just a few days. Companies still aren't doing enough to protect the environment. There are plenty of other things that they could do, like creating six-pack rings that are edible to fish.
All of these companies put forth the minimum effort to make it look like they're helping the environment, but in reality they couldn't care less. If they don't care enough to pay their employees a living wage, why would they actually make an effort to improve something more intangible like the environment?
It's probably easier and cheaper for most companies to think short-term, which means cheap manufacturing processes and plastic that isn't biodegradable or recyclable. Longer term it would be much better if companies on a global scale used environmentally friendly products and processes, but not a lot of them are doing so now.
This is a great step and is a very positive thing that they are doing, but companies could be doing a great deal more to help out with the enviroment. There are many more steps they can continue to take. There are still companies that dump trash in the waterways for example.