Probably one of those virtually indestructible plastic-y things rather than cardstock but that's my guess.

Depends on how often they plan to change out the IPA. Admittedly, I haven't had a beer on a flight in awhile (mostly due to tito's being available), but I recall for awhile there, the IPA selection seemed to change quite frequently.

Agree that this is a disappointing development overall. Didn't have to travel this week, but I did flip through hemispheres last week, and generally do so, even if it's just for 5-10 minutes. I also still have the stack of hemispheres in my guest bathroom from during COVID when they mailed them to your house. Always a fun conversation starter if I have people over to the house that haven't been over before.