It's honestly really easy to dehydrate slice of fresh fruit in your oven. The time it takes varies by fruit, so definitely check out this post about How to Dehydrate Fruits and Vegetables from the Food Network if you're going to make your own cocktails. If you don't have the time to dehydrate fruit slices (which honestly, you might want to make time for because it's much more frugal), you can purchase dehydrated fruit online.