yea i see what you mean haha ... i will keep a eye on them twice daily.Jeez, dude, lets party! You could do a James Bond "shaken, not stirred martini" in that thing. Might get a little tippy if you're starting a bunch of different seeds and trying to corral them in a tray over a heat mat.
It will work, but keep an eye on moisture in there. If the seeds are too high on the sides of the cup on the paper, it might dry out sooner than you think. Over time, you'll see moisture on the lid, but the paper below can actually dry out in places.
Party on...