Early Christmas morning (or, you know, early December 25th, since Christmas wasn't really a holiday there), Prompto would find a festively-wrapped package left outside his door, along with a note:

So I was on the phone with Verity while shopping at T&C, talking about possible Christmas gifts for you, when the cheese panda walked up and shoved this in my hands and wouldn't let me leave without purchasing it. So... Merry Christmas from me and the cheese panda, I guess? - Liam

[ooc: yes, I know I ruined the surprise by showing you the video of this being assembled already but I COULDN'T RESIST???]