Kudos to Sal****er Brewery out of Delray Beach, Florida. Recognizing that plastic 6 pack rings have long posed a threat to aquatic life, they've developed an edible, biodegradable 6 pack ring made from barley and wheat left over from the brewing process.
I've never had their beer, but I'd drink a toast of it as a thank you for this innovation...
Edit: ^^^ So we can't type "sal****er"? Salt|water. That's one hyper-vigilant obscenity filter.