E-liquid, also known as vape juice, is a liquid used in electronic cigarettes and vaping devices. It typically contains a mixture of propylene glycol, vegetable glycerin, flavorings, and nicotine, although nicotine-free options are also available. The liquid is heated to create vapor, which users inhale, providing an alternative to traditional tobacco smoking. The flavorings in e-liquid can range from fruity and sweet to savory and minty, catering to various preferences. E-liquids come in different nicotine strengths, allowing users to choose how much nicotine they want to consume. This versatility has contributed to the popularity of vaping among those seeking alternatives to smoking.