Sort of a Shrödinger's cat situation, except instead of existing as anything between two options and solidifying if it's observed, it can only be solidified if the move is used, and the boxes themselves exist in a state of flux between existence and non-existence, at least until removed from Delibird's pouch.
With the way it thumbs its nose at physics like that, I'd almost say Delibird might be the proxy of some sort of chaos-loving extradimensional entity. I might say that, but then I would open up to whether Blastoise would be subject to a similar entity that allows it to store a nigh-infinite amount of Hydro Cannon water within a finite amount of body space, or whether the Miltank, Pikachu or what have you that learned Present from a Delibird father is also tied to a similar otherworldly being. It's probably best to just roll with the Pokémon universe's unusual treatment of the nature of matter. You'll be saner that way.

I don't know that I've ever had tonic water, actually. I might have to try that sometime.

Anyway, you are not the only person who doesn't drink alcohol around here. Neshomeh is also a teetotaler, and that is perfectly fine. Just means there is more alcohol for me. :P

So, enjoy your drink of choice, everyone!

-Phobos

I, uh, may have gone overboard on the baking >.>

If you want uj cake, vode, you may have it. :D