One of the most important items in Rising Star is the Cold Pizza Slice. You can obtain one randomly each time you complete a mission and getting one of these completely refills your energy back to 100% to allow for more missions immediately! However, are you annoyed at getting pizzas when you have lots of energy, or not getting any when you run out? Get a pizza box! Each pizza box allows you to store one pizza slice for later use so if you have multiple pizza boxes you can store a lot of slices for later and go on a mission binge!