Anyone want to guess?

Made from thick porcelain, the bowl is 14cms high and 20cms across the centre at the top.

Lid doesn't seal, it just sits.

Lid has two recessed holes for lifting.

Metal container inside is aluminium and just sits there, not real snug. Lift that out and there is a hole in the base of the bowl. Air space between the metal container and sides of bowl.

Any Guesses?