Check this out. It is a R2 unit that has a been loaded with electronic Super Soaker parts and filled with blue gatorade. What is the BEST part about this, is that it looks like our little android pal is taking a pee right into your cup. Spell it out loud "I CUP". Works every time.
"After spraying it white and masking off the entire thing with blue painter’s tape, the shapes for the blue designs were cut out and painted. Half of a foam sphere from the hobby shop was used to form the dome."
[ source ]