Startup makes levitating cup that floats mid-air
US-based startup Oak Bottle has made a $149 'Levitating Cup' that floats mid-air. It consists of two parts, a cup and a magnetic base that use the physics principles of 'Quantum Locking' to set itself afloat and spin 360 degrees in mid-air. The cup can be left suspended in air for up to eight hours on a single charge.