[bluetoy]

It would make the air swirl until it hit the throttle plate. then you would have massive turbulance..That thing is just a restriction in the intake tube. If you use the two bottle example in the "tornado" ads you'll notice the bottles are sealed. Of course the water will slurp through unless it's spinning. The air needs to travel into the bottle that is emptying. If both bottles were open on both ends the water would flow just as fast if not faster than spinning it.