Astronaut Water -- It's a Pisser

The #1 source for drinking water in space ... is #1.

Astronauts on the International Space Station had their first taste of liquid goodness from their new urine recycling system -- which magically transforms pee, sweat and water condensed from exhaled air to create a nice cool glass of aqua. Who's thirsty!?

But here's the crazy part -- not only do the astronauts think the final product tastes great ... but they even cracked jokes about it, claiming the water came with this special warning: "drink this when real water is over 200 miles away."