Make sure you have a tight sealing cap. Air can’t come in the top to replace water that would leave out the bottom, so water doesn’t leave. Its the same reason you put two holes in large pourable containers- air and water use different holes reducing the glug, glug, glug.
Jim Smetchland’s Rating D+
“The production team let me down entirely on this project. It was hard to see, the ‘science’ wasn’t particularly intersting, and the overall feel was cheap. The last scene seemed cut short to hide the fact that the contraption didn’t work. And of course you need a tap to make this tap so what’s the point?”