From the category archives:

Time

Modern Hour Glass Clock

by FreshEffect on April 24, 2006

Modern Hour Glass Clock

This modern-day hour glass clock is a more advanced version of the old clocks with the sand. This up-to-date version features two cones rotating at different speeds to indicate the time. The upper cone represents the minutes and the lower cone represents the hour. A vertical red line shows where to read the current time. To power the clock, it requires one AA battery and lasts several months. Available here for $45. Via Coolest Gadgets.