Lester J. Fangman - Seneca KS, US Dale A. Sudbeck - Baileyville KS, US Scott A. Sargent - Des Moines IA, US Tim R. Phillips - Altoona IA, US J. Todd Ferrell - Clive IA, US
A double walled container is provided by an inner container that is fitted within an outer container. End flaps are provided on the outer container for engaging the inner container and closing the gap between the inner container and the outer container. The method involves lifting the inner container out of the outer container, removing the grease from the inner container, and inserting the outer container back into the inner container.