No, that's not some kind of obscene euphemism. It just seems that a fan was enough of a gourmet to bring the keyboardist of Afterschool Tea Time's likely-delicious food-craftings to the world of 3-D. Yes, he replicated Tsumugi's bento box, for the accumulated cost of about $30.
And it seem's he's succeeded, at least on the visual level. We've yet to develop a way of tasting things over the internet, after all. For that matter, I wonder if he bothered to eat it at all, or if he tried to feed it to a TV screen or hug pillow.