It's a quick trip back to the kitchen for the other two, and then he follows Persephone and Thanatos up the stairs with his own mug. It takes him a bit longer, as he can't simply float and has to be careful of his mug spilling on the stairs, but he eventually joins them at the table. "Oh- well, I hope you like it!" Maybe it doesn't have to be as good as Lia's to be good enough.