English 19
C
ookw
ar
e g
uide
Cookware
Microwave-
safe
Comments
Fast-food
packaging
•
Polystyrene
cups/containers
✓
Can be used to warm food. Overheating
may cause the polystyrene to melt.
•
Paper bags or
newspaper
✗
May catch fire.
•
Recycled paper
or metal trims
✗
May cause arcing.
Glassware
•
Oven-to-table
ware
✓
Can be used, unless decorated with a metal
trim.
•
Fine glassware
✓
Can be used to warm foods or liquids.
Delicate glass may break or crack if heated
suddenly.
•
Glass jars
✓
Regular glass is too thin to be used in a
microwave, and can shatter.
Metal
•
Dishes, Utensils
✗
May cause arcing or fire.
•
Freezer bag
twist ties
✗
Paper
•
Plates, cups,
napkins and
kitchen paper
✓
For short cooking times and warming. Also
to absorb excess moisture.
•
Recycled paper
Do not use recycled paper towels, which
may contain metal and may catch fire or
cause arcing.
Cookware
Microwave-
safe
Comments
Plastic
•
Containers
✓
Can be used if heat-resistant thermoplastic.
Some plastics may warp or discolor at high
temperatures. Do not use Melamine plastic.
•
Cling film
✓
Can be used to retain moisture. Avoid
wrapping the food too tightly. Take care
when removing the film as hot steam will
escape.
•
Freezer bags
✓✗
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.
Thermometer
✓
Use only those marked “Microwave-
safe” and follow the directions. Check the
temperature in several places. You can use
conventional thermometers once the food
has been removed from the oven.
Straw, wicker, and
wood
✓✗
Use only for short-term heating, as these
materials can be flammable.
✓
: Recommended
✓✗
: Use caution
✗
: Unsafe to use / Do not
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