Never use sealed containers. Remove seals and lids before use. Sealed containers can explode due to a build up of pressure even after the oven has been 
.
Take care when microwaving liquids. Use a wide mouthed container to allow bubbles to escape.
Never heat liquids in narrow necked containers such as baby bottles, as this may result in the contents erupting from the container when heated and cause burns.
To prevent sudden eruption of boiling liquid and possible scalding:
1.Do not use excessive amount of time.
2.Stir liquid prior to heating/reheating.
3.It is advisable to insert a glass rod or similar utensil (not metal) into the liquid whilst reheating.
4.Let liquid stand for at least 20 seconds in the oven at the end of cooking time to prevent delayed eruptive boiling.
Do not cook eggs in their shells, and whole hard boiled eggs should not be heated in microwave ovens since they may explode even after microwave cooking has ended. To cook or reheat eggs which have not been scrambled or mixed, pierce the yolks and the whites, or the eggs may explode. Shell and slice hard boiled eggs before reheating them in the microwave oven.
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