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• Aluminium bowls
Aluminium bowls (e.g. ready-made meals) are partially suitable. To use them in the
microwave the aluminium bowls must have a minimum height of 3 cm.
3.3 Unsuitable materials
Unsuitable materials are containers made of metal like metal pots, metal pans and
metal lids.
3.4 Size and shape of suitable materials
Food can be cooked better and more even if they are prepared in flat and wide con-
tainers. Narrow and high containers are not that suitable.
Also round or oval containers are more suitable than square containers as local heating
can occur in the edges.