TJ’s carries jugs of it seasonally. Just toss it in a big pot to warm it up and then put it in a Thermal dispenser "Airpot"
For a crowd, you can keep a backup batch warm in an Instant Pot (for Rice & Bone Broth), even without access to a kitchen.
If you need disposables, I like these insulated cups:
8oz seems a little big (maybe because the tops are wide enough for standard lids), but I also put out 4oz cups out for the Mulled Wine and I sometimes think that’s the proper size for both because it forces you to go back more frequently rather than sipping on a cup that has already cooled down.
(And I personally think cider is pretty intense, even if it’s non-alcoholic.)