Sour Patch Watermelon was one of the many Sour Patch Candies released. They are in the shape of a Watermelon.
These are fairly common, so you can most likely find these at any Local Store. (Walgreens, Walmart, CVS Pharmacy, etc.)
- It could be possible that "Sour Watermelon" were the orignal Sour Patch Watermelon, since they were made by the same company back in 1993. Although, it is unknown, since it's not under the Sour Patch name.