Yes, we have an official replacement for the MacQuarium as the best use for a 25-year-old Mac: Cut a slot into it so it can serve as the ultimate past-meets-future iPad stand. Great work from Flickr user Mapgoblin, though you might want to consider washing the front of your old Mac if you decide to emulate him.
(And yes, I know the photographer thought it was a Mac Plus — I’m pretty sure it’s actually a 512k Fat Mac)