This foot-powered washing machine saves water and energy. Drumi is a portable washer by Yirego and was founded by Yi Jiang. He saw a problem with the laundry done in developed countries. Most washing machines use 15 to 28 gallons of water per wash. And could cost you over $250 a year. The Drumi uses just 2.6 gallons of water. And only cost you 10 minutes of workout. It can hold five pounds of clothing. A medium size laundry machine can hold around ten. It’s perfect for laundry on the go!