The materials used to create the CakeSafe, and the way it's constructed, make for stress-free deliveries. The center dowel which runs through your cake, is a 3/8" stainless steel rod. It is secured both at the top and the bottom of the box. With your cake in the box, the rod runs from the top of the box, through your cake, and into the bottom base of the box. The sides are double-walled which insulates the cake from heat. When the CakeSafe is fully assembled, your cake is nearly impervious to all outside conditions.