Yes I have been thinking of getting one of those. I'll update here on how Sawyer is doing, and hopefully I can release him back in the tank sooner rather than later. :)
I won't be able to get the tank for a few days anyways, so that's why I asked how long he could stay in the cup. For future reference though... How do you maintain a qt tank? Do you just fill it with clean water when you need to put a fish in and then drain it completely until you need it again? Does it have to have a filter, gravel, and other things to make it "home?"