While shopping for a new refrigerator the other day, one of the latest features being touted is a special pizza storage bin in the freezer section.  This bin is designed to hold your frozen pizza vertically instead of horizontally thus saving space and making is easier to access.

However, while I realize that the pizza is frozen, some of the pizza topping is going to end up in the bottom of the box.  But, I suppose you can always dump the loose contents back on top of the pizza just before it going into the oven.