Here is a goal: What to do if your windshield fluid reservoir is empty?

Which way makes more sense to accomplish this goal?

Choose from: (a). Fill it but be careful to drive slowly and carefully so it doesn't all spill out again.; (b). Fill it with water, or better, with windshield fluid. You can also use something commonly found around your home such as Windex diluted with water until you can buy the standard fluid at the gas station.;
(b).