The realization that he'd been caught talking to himself had Marco a bit startled for a moment, and he only turned long enough to identify the voice before turning back to the machine and trying not to seem awkward. Felix had been here long enough to know that he was weird, but they'd never really interacted enough for Marco to feel okay with being caught being weird. Oh well.
"I don't really know," he replied, reaching out and pressing the Coke button a few more times. "It asks you to pay, but there's no cash or card button, so I don't... I don't know." He pressed the Fanta button a few times too, then groaned when nothing happened. "Maybe if we shake it?"