well maybe a gaming mouse that is for both hands and ergonomic
and some other adjustments for like Rat7 except doesnt look like shit

would be a possibility though i have no idea about ergonomic designs etc.. and the Rat7 is pretty complex.
mate wanted to do some kind of cubic cup with its handle on the inside so that nothing sticks out.. that way he wanted it to take less space in cupboards and be easily stackable.
prof. said a cup wouldn't be enough, he'd have to make a plates etc as well.

hmm..

make it like a zero except with the top open
you're going to have to use caustics if you want it to make it like glass, and to get the lighting right and everything, it'll be hard