You are going to need lots (and I mean lots) of fresh clean towels.

Wear clothes you won't mind getting messy or pricked form their little nails, and change as soon as you can so as to not expose your kitties to them. Since they haven't been tested for anything, you don't want to risk taking the chance of infecting your cats. You'd be surprised at how icky you get from feeding them. Disease can spread from feces and their saliva, so please make sure your kitties don't get too close to any clothes that have either on it. Boy did I do a lot of laundry when I had the bottle babies, but it was so worth it!