We suggest that you reheat your meals by first REMOVING the lid off of the container and microwaving the meal anywhere from 2-3 minutes according to your preference. If you froze your meal(s) we suggest defrosting the meal in a fridge over night then heating as suggested. If you plan to place in the over our containers are both microwave and oven safe. Remove lid and heat at 350 degrees for 10-15 min.