Before you go to work on it,go to wally world etc and look next to the adult diapers in the pharmacy section and find some absorbant underpads ( they're cheap) Those things are about 3' by 2' and will soak up just about anything. Lay a few undre the car before working on it and you won't spill a drop.
I do mobile service at peoples houses sometimes and it's no problem doing oil changes etc without leaving a spot.

--------Robert