The unusual shape can also be forced upon the vegetable. In Japan, farmers of the Zentsuji region found a way to grow cubic watermelons by growing the fruits in glass boxes and letting them naturally assume the shape of the receptacle. The square-shaped watermelon was intended to make the melons easier to stack and store, but because the melons must be picked before they are ripe they're inedible; the cubic watermelons are also often more than double the price of normal watermelons. Using similar techniques, growers have also created more complex shapes of watermelon, including dice, pyramids, and faces.