Square watermelon

Ever seen Square-shaped watermelons? or Pyramid- shaped ones?

Not only do they look exotic, they can be cultivated easily too. And nope, they are not products of genetic engineering or hybridization.

from wikipedia:
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 container.The square shape is designed to make the melons easier to stack and store