text: Considering a drop can only keep it's consistency for only a few thousand feet, because it IS only water falling through air, you might be able to get a drop out of a cloud that could measure up to 4 or 5 ounces in volume, or big enough to fill the bottom of a regular glass with water up about 1 1/2 inches before it starts to break up and dissipate. \nFactors could be ceiling height (the bottom of the general cloud cover, that is), temperature, type of cloud, and wind resistance among other things I may not have thought of.\nBut, really, I don't think anyone would actually be capable of proving that.