Does anyone know the internal diameter of the standard (2L) Remoska. We are thinking of getting one but want to know if we can fit any of our dishes in. At the moment we prepare dishes like lasagna and cottage pie in rectangular dishes and freeze them before putting them in the motorhome freezer. They are heated in our small oven. With the Remoska we will need to put two in together so need to know the maximum size dish we can use. I believe the Remoska has slightly sloping sides so Inside bottom and top dimensions would be appreciated.