A heating mantle is a laboratory device used to provide uniform heating to glass containers, such as flasks or beakers. It consists of a fabric or metal exterior that surrounds a heating element, allowing for controlled temperature applications without direct flame. This makes it safer and more efficient for heating liquids in scientific experiments. Heating mantles are commonly used in chemistry and biology labs for processes like distillation and reflux. They can be adjusted to different temperature settings, ensuring precise heating. Many models also come with built-in temperature controls for added convenience and accuracy in experiments.