Abstract: The invention relates to a receptacle operable for supporting substances to be heated in a microwave oven, the receptacle comprising a bottom space (6) separated from a top space (5) through a shelf, the shelf (4;4?) being supportable horizontally above a base (2), a cover dome rising from the base, the cover dome having a first cover dome section (7; 7?; 7?) movable relative to a second cover dome section (8;8?;8?), the cover dome sections enclosing the top and bottom spaces in a closed position, the cover dome being openable inside the microwave oven to provide access to both spaces in an open position.