Although Philips say 20 cm for the Chocolate cake , I find 18 cm best as you can get your fingers and a tea towel or oven mitt down the side and lift the container out. Have tried tongs but no go .
Yvette, I was thinking the same about the foil trays. Also, you know the silicon BBQ liners? I thought I might cut one up and staple the corners to form a shallow tray.