Coffeecup Gimbal

A simple coffeecup stabilizer.
Of course it is preassembled; 3-d printable without support.
P.S.
It did not work very well. Ideas are wanted.
I suppose the liquid surface must be well below the pivots.
P.S.2
I finally noticed that a string is enough for a gimbal, and actually found the exact design: http://www.core77.com/blog/object_culture/edmund_scientifics_no-spill_coffee_device_26583.asp