Just-add-water melon

Purchasing watermelons in supermarkets can be tricky. I often see people having problems with them rolling out of control down the checkout conveyor belts. In addition to this, they are extremely cumbersome and difficult to fit into a bag with the rest of your items.

Wouldn't it be great if you could somehow dehydrate them, and be able to reconstitute them at a later date by adding water? They would be much easier to handle if they were the size of an apple.