Shipping a frozen pizza requires packing the pizza in dry ice. As long as United Parcel Services (UPS) regulations are followed, the rest of the shipping process is normal. Please note that, according to UPS, "because dry ice shipments are not regulated for ground transport, [you should] process these shipments as you would any of your UPS ground shipments."
Wrap the pizza in shrink wrap the day before shipping. Place the pizza in your freezer overnight.
Remove the pizza from the freezer, and wrap in shrink wrap again. If the dry ice touches the pizza, it could cause damage and ruin the food, so it's advisable to wrap the pizza several times.
Pack the wrapped frozen pizza in the insulated shipping container. If you have more than one frozen pizza, stack them one on top of the other in the bottom of the container.
Put on the gloves. Place the dry ice directly on top of the frozen pizza; do not separate the ice from the pizza. However, to keep the pizza from shifting around during shipping, use the packing material to fill in any extra space. This will also help to keep the dry ice from warming.
Close the insulated container and seal. Label with the appropriate recipient address information according to UPS guidelines.
Bring the container to your local UPS store and follow regular shipping instructions.