Sterilite food storage are microwave safe. They are commonly made of polypropylene which has a melting point of 170°C (338°F).
The boiling point of water is 100°C or 212°F, therefore Sterilite food storage can withstand it. But be cautious as the lids are often made of somewhat more flexible. Very high water temperatures may warp the lids.
Please check your microwave manufacturer's instructions for information regarding the use of microwave safe containers in your microwave.
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