Square watermelons
2023-07-24
From Wikipedia:
Square or cube watermelons are watermelons grown into the shape of a cube. Cube watermelons are commonly sold in Japan, where they are essentially ornamental and are often very expensive, with prices as high as US$200.
They are grown in boxes, which form them to their distinctive shape. I discovered these via the Kroger app, which has distinctly wonderful food facts as it's loading screen.