He is an alien, so he has no idea how to prepare them. But he's drank warm alcohols before because he is well-travelled and a two-legged garbage compactor that would try most things, so long as they were probably not poisonous, once.

(Probably being the operative word.)

"I might have been doin' him a favor then, I'm sure he's more bored by lack of things to do than he lets on." He's assuming because Yondu gets very bored during down time. But he follows after, figuring that he should get indoors anyway and take a break rather than people watching.