Vape juice, also known as e-liquid or e-juice, is a liquid used in electronic cigarettes and vaping devices. It typically contains a mixture of propylene glycol, vegetable glycerin, flavorings, and sometimes nicotine. The liquid is heated in the device to create an aerosol, which users inhale. Vape juice comes in various flavors, ranging from traditional tobacco to fruity and dessert options. The nicotine content can vary, allowing users to choose their preferred strength or opt for nicotine-free options. This versatility has contributed to the popularity of vaping as an alternative to traditional smoking.