Like the stuff on the labels, "Listen!!", "HTT"(Assuming that isn't some normal thing on labels.), and is the "Working!!" label reference to the anime?
Whoa, you're not kidding. Those labels are full of Easter eggs. The one to the far right reads "Azu-nyan", for instance. And the "WORKING!!" symbol would be debatable, but that knife-and-fork logo makes it pretty clear.
