Everyone who knows what a microwave is knows microwaving a dog kills it. How many people do you think realize that pressure can build up in a thermos if leftov

Everyone who knows what a microwave is knows microwaving a dog kills it. How many people do you think realize that pressure can build up in a thermos if leftover food or drink ferments in it? And even if you know the danger, how do you know if the thermals bottle you are holding is dangerous or not? Should people call the bomb squad every time they see a thermos with unknown contents inside?