Fastest way to cool down a cup of coffee?

You know the drill, your are desperate for some coffee but the temperature of the newly served coffee is molten lava. What’s a good way to quickly cool down a cup of coffee? Or tea off course — It’s just water anyway.

I know one fast way with Liquid Nitrogen;

This article is available in video format here.

It occurs from time to time i forget my Liquid Nitrogen at home. In that scenario, what’s the best way to cool down the black gold as past as possible, if you have nothing? No ice cubes, no saucer and so on? Let’s test the following 3 common cooling options:

1. Stir the coffee around with a spoon
2. Lift the coffee up and down with a spoon
3. Blow on the coffee

These 3 different options are clarified in this image here, same order.