Cookware Microwave-Safe Comments
Disposable polyester
cardboard dishes
✓
Some frozen foods are
packaged in these dishes.
Fast-food packaging
containers
✓
Can be used to warm food.
Overheating may cause the
polystyrene to melt.
newspaper
✗
May catch fire.
metal trims
✗
May cause arcing.
Glassware
✓
Can be used, unless
decorated with a metal trim.
✓
Can be used to warm foods
or liquids. Delicate glass
may break or crack if heated
suddenly.
✓
Must remove the lid. Suitable
for warming only.
Metal
✗
May cause arcing or fire.
ties
✗
Paper
napkins and kitchen
paper
✓
For short cooking times and
warming. Also to absorb
excess moisture.
✗
May cause arcing.
Plastic
Cookware Microwave-Safe Comments
✓
Particularly if heat-resistant
thermoplastic. Some other
plastics may warp or discolour
at high temperatures. Do not
use Melamine plastic.
✓
Can be used to retain
moisture. Should not touch
the food. Take care when
removing the film as hot steam
will escape.
✓ ✗
Only if boilable or oven-proof.
Should not be airtight. Prick
with a fork, if necessary.
Wax or grease-proof
paper
✓
Can be used to retain moisture
and prevent spattering.
✓
: Recommended
✓✗
: Use caution
✗
: Unsafe
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