Source: http://www.thriftyfun.com/tf75745614.tip.html

Microwave Safe Mugs

How do you tell if a coffee mug (or any other dish, for that matter) is safe to use in the microwave? I buy a lot of mugs at thrift shops and yard sales, so some of them are probably old enough that they might not be safe. I seem to remember something along the lines of filling the mug with water and microwaving on high for a certain length of time and if the handle gets hot, that means it's not safe for the microwave. But I can't remember, like how long is the length of time you're supposed to do it; can anybody help?

Lynn from Chico, CA
Source: http://www.thriftyfun.com/tf75745614.tip.html
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