An American brewery is currently trying to put these into production. I'm all for it, though I'd be interested to know how significantly it will affect the price of one of their sixpacks.
https://wokesloth.com/six-pack-rings-feed-animals-instead-of-choking/alexa/
https://wokesloth.com/six-pack-rings-feed-animals-instead-of-choking/alexa/