Oh, we had something like this in college. The vendor would load up the… well, actually, it was more like a big version of those little coolers you see in the checkout line in grocery stores—the ones with the sodas and stuff in them. Anyway, the vendor would load them up every couple days. It’d have sandwiches, salads, puddings (which were actually really popular), sodas, Gatorade, water, and a bunch of other stuff. If we wanted something, we would just get it out, scan the barcode on the scanner attached to the handle, tap our phones or cards to pay, and be on our way.