Limited Use; Not Recommended - Royal Sovereign RCMW1000-25SS Owner's Manual

Glass and glass-ceramic bowls and dishes: Use for heating or cooking.
Paper plates and cups: Use for short-term heating at low temperatures.
Do not use recycled paper, which may contain metal and could ignite.
Wax paper: Use as a cover to prevent spattering.
Thermometers: Use only those labeled "Microwave Safe" and follow all directions. Check the food in several places.
Conventional thermometers may be used on microwave food once the food has been removed from the oven.

limited Use

aluminum foil: Use narrow strips of foil to prevent overcooking of exposed areas. Using too much foil can damage your oven,
so be careful. You should keep distance of 1 inch (2.54cm) between aluminum foil and cavity.
Ceramic, porcelain, and stoneware: Use these if they are labeled "Microwave Safe". If they are not labeled, test them to make sure
they can be used safely.
Plastic: Use only if labeled "Microwave Safe". Other plastics can melt.

not Recommended

Glass jars and bottles: Regular glass is too thin to be used in a microwave. It can shatter and cause damage and injury.
Paper bags: These are a fire hazard, except for popcorn bags that are designed for microwave use.
Styrofoam plates and cups: These can melt and leave an unhealthy residue on food.
Plastic storage and food containers: Containers such as margarine tubs can melt in the microwave.
Metal utensils: These can damage your oven. Remove all metal before cooking.
note: Should you wish to check if a dish is safe for microwaving, place the empty dish in the oven and microwave on HIGH for 30 seconds.
A dish which becomes very hot should not be used.
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