A tube pan is a specialty pan that is used for angel food cakes and chiffon cakes. The tall sides and inner tube allow the cake to “climb” the pan and cling to the sides while it bakes (which is why you never grease these pans!). Perhaps even more important are the “feet” that allow the cakes to cool upside down without the top of the cake touching the counter or a cooling rack. This is vital in ensuring that the cakes maintain their volume and do not collapse. Baking an angel food cake in a traditional cake pan or Bundt pan will unfortunately not work; the cake will fall.