
Well, it hurts us to say this, but. As gently explained to us by the good people Grist, these corn-derived plastics are made, predominantly, by bloated industrial-farming and modified-food titan Cargill, from corn harvested at no small carbon cost; they're "biodegradable, but only in commercial composting facilities or other composts [with very difficult-to-replicate conditions]", and you run into major problems trying to effectively recycle it.
Plastic made from corn is a lot like fuel made from corn — the cups are still, basically, plastic, and their most prominent local purchaser should reconsider using them. It's a shame you can't use paper cups for beer; the solution, I guess, is for Habana Outpost to start serving beer in glass Mason jars, as god intended.