An hourglass (sandglass, sand timer, sand watch, sand clock, egg timer) measures the passage of a few minutes or an hour of time. It has two connected vertical .\rbr\rbrAn hourglass (sandglass, sand timer, sand watch, sand clock, egg timer) measures the passage of a few minutes or an hour of time. It has two connected vertical .\rbr\rbrcan you wait until it finishes?\rbr\rbrIts more exciting than the average egg timer and more practical than a lava lamp, unlike a normal hourglass timer the sand in the amazing Hourglass Tea Timer .