It is a weapon in the Liu Cixi's science fiction:three body. Shape like a water drop make of reflation things like mirror.Can reach 20% of light speed. I think it would be fun if we made it in orbiter.
OOPs...I thought you might be talking about Italian Astronaut Luca Parmitano's (prob)-lem he was having with water(drop) in his spacesuit.....:facepalm: