This morning I open the fridge, and there sits a small container of orange juice that clearly says "Keep refridgerated" on it.
It wasn't there thursday night, it wasn't there Friday or Friday night, it appeared this morning... saturday morning, which means its been sitting out for almost 3 days.
Oh, the mystery e-mail of "when you entertain, what foods do you serve your guests" is solved. It wasn't a delivery of food. It wasn't food stored in her bag (although apparently they're keeping half a grocery store of refrigeration required foods in their room unrefrigerated).
The solution is: the embroidery on the aprons that she made us both.