How do I test if a utensil is safe for microwave use?
Fill a microwave-safe container with 1 cup of cold water (250ml) along with the utensil in question and cook on maximum power for 1 minute. Carefully feel the utensil—if it is warm, do not use it for microwave cooking. Do not exceed 1 minute cooking time. (Page 8)
From the official Toshiba Mw2 Mg20P Wh 3 In 1 Combination Microwave manual, page 8
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