a process for forming a two compartmented fiber dough can comprising forcing a thermoplastic cup into the lower part of a container , inserting a duct close to the cup and filling the same with icing , forcing a divider plate into engagement with the cup and the inside wall of the can so as to form a triple seal , introducing a dough product on the opposite side of the divider and sealing the open end of the container with a top closure , and allowing the dough to proof .