1. Ordinary glass bottles cannot be heated in the microwave oven. Only the glass made of high borosilicate and marked with the words for microwave oven can be put into the microwave oven for heating. Glasses, milk bottles and nursing bottles made of ordinary glass are only suitable for short-time heating in the microwave oven, about 3 minutes. If they are heated for a long time, they will easily break.

2. avoid using metal utensils: because the utensils such as iron, aluminum, stainless steel and enamel put into the furnace will generate electric sparks and reflect microwaves when heated by the microwave oven, which will not only damage the furnace body but also heat food. Avoid using closed containers: wide-mouth containers should be used when heating liquids, because the heat generated by food heating in closed containers is not easy to dissipate, which makes the pressure in the containers too high and easily leads to blasting accidents.