You've got the green light on glass ... However, some older glass might not have this symbol. Editor's Tip: Keep an eye out for microwave-safe symbols on anything you might be tempted to heat ...

Always check for the microwave-safe symbol or 5 (polypropylene). Thin plastics can melt and release bisphenol A (BPA), which has been linked to health issues. Use BPA-free, microwave-safe plastic ...