I was thinking a lot about it and came up with the idea (with a little help of course) if using one of those large 5 gallon water containers as the tank. We were going to set it on a base inside a tray, with sides that go up about an inch roughly and secure it to that. Drill a hole in the bottom that isn't higher than the top of the base's wall and not too low either. To keep it heated I was going to make a hole in the lid and run the cord through there and seal it back up again so it's airtight.