Miele M 7140 TC Operating Instructions Manual page 36

Suitable containers for microwave ovens
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Danger of explosion due to
pressure build-up.
Pressure can build up during
reheating in sealed containers or
bottles, causing them to explode.
Sealed glass containers, such as jars
of baby food, must be opened before
they are heated in the microwave
oven. Do not attempt to heat them
up unopened. With baby bottles, the
screw top and teat must be taken
off.
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