[A large, tattooed arm reached passed Zhongli, a clear, rectangular object in his hand that was used to pay for the tea... as well as his own order. When it was given back, Gladio took a step away and grinned.]

When you got here, did you grab one of these things?

[He lifted the phone and gave it a little wiggle, before he shoved it into his back pocket.]

Turns out that's how you pay for things. It's got some money on it, not much. So tea's on me this time.