Waterdrops In The Nature

The classic shape associated with a drop (with a pointy end in its upper side) is actually an optical effect due to light reflections and the drop's rapid movement. The shape of a drop falling through a gas is actually more or less spherical. Larger drops tend to be flatter on the bottom part due to the pressure of the gas they move through.
Although scientists traditionally thought that raindrops came in various sizes due to collisions on the way down to the ground, French researchers concluded that it was due to the drops' interaction with air, which deforms the drop and causes it to split into smaller drops. This effectively limits the largest raindrops to about 6 mm diameter, or 0.065 ml volume.