It’s called the D20 Critical Hit Mini Cake Pan and it makes four cupcakes, but each of them are awesome. They will be a bit messy since you have to frost all sides. Each mould makes a 3-inch cake. The D20 is oven, microwave, dishwasher, and freezer safe. That means you could also make D20 ice pops in the summer or giant D20 ice cubes. Each pan costs $12.99(USD) at ThinkGeek.
Technabob says if you roll anything over 15, your character gets diabetes.