On the wrist : H2O

Granted, the two liquids moving around inside the tiny capillary to tell the time are far more than just coloured water The coloured liquid is indeed making its way around the dial, but it does so in contact with another, colourless liquid Each liquid is pushed around the dial by one of the two bellows, the left one pushing the coloured liquid to indicate the hours, the right one pushing the clear liquid to "Clear" the display at 6 o'clock.

The twice-daily "Reset" at 6 o'clock is just one of two things that are part of the fun of owning a HYT In addition to watching the liquid slowly flow back into its well at 6 o'clock, you also regularly find yourself doing a double-take at 30 minutes past the hour Telling the time itself actually takes a back seat, since there are occasions when neither the liquid nor the minute hand is likely to be displaying the exact time.

Although the minutes hand is in the conventional place, the liquid moving around the edge of the dial is pushed by linear forces, which means that variations in the speed at which you turn the crown translate into variations in the speed at which the liquid moves around the dial The model I wore has a stainless-steel case with black DLC coating and fluorescent liquid, the other has a case with silver tones and a deep blue liquid. . Source