This is a simple hourglass designed by Lihi Svirsky, an industrial design student at Shenkar College. If you use the hourglass with an equal amount of sand in a coffee cup, the flow of sand is about 5 minutes.
Sleek, elegant Japanese design: Created by designer Yukio Hashimoto. The pieces are hand crafted using the traditional Japanese craft technique of "wappa" or wood bending. Wooden boards are bent in hot water, creating beautiful curves