Toshiba's water-wave oven uses water vapor to reach high temperatures to ferment yogurt. High temperature will ferment yogurt. Toshiba's water-wave oven is a combination of an electric steamer, a microwave oven and an oven. Compared with ordinary microwave ovens, it uses water vapor to reach high temperatures, which takes less time and is more versatile. There is no need to worry about food drying and dehydration. .