"As good as the replicated stuff gets." It's an herbal spiced tea that Spock recommended to him and one Jim's passed on to Felix. One of the few teas Jim's gotten a taste for out of the options available to them from the replicator. When Felix is done drinking Jim pulls the mug away to set back on the bedside table before fetching his own to drink deeply from.

Felix is watching carefully, so he'll catch the way Jim clenches his teeth before he hides behind his mug. He's not drinking now, just buying himself a few precious seconds to think before he opens his mouth and says the first thing that comes to mind.

"...Oh, really?"