Yes, ramekins are safe to heat up in the microwave. They are also heat and stain-resistant, which means that you can put them in the dishwasher without worrying about them losing their shape or color. Just make sure to use caution when handling them, as they can become quite hot. If you're looking for a versatile ramekin that will sustain you for years, a stoneware ramekin can be a great option. It's sturdy and resistant to scratches.