If you use a mold to make cake popsicles you can ensure they're all going to be the same size and shape. Once you know how fun it is to make your own cake pops, you're going to want to experiment so investing in a good mold is a great idea. You can always make other kinds of popsicles in there too. I like silicon molds because they're flexible and you can toss them in the dishwasher since they are heatproof.