A vape pen is a small, portable device used to inhale vaporized substances, typically containing nicotine, cannabis, or flavored liquids. It consists of a battery, a heating element, and a cartridge or tank that holds the liquid. When the user activates the pen, the heating element warms the liquid, turning it into vapor that can be inhaled. Vape pens come in various shapes and sizes, making them easy to carry and use discreetly. They are often rechargeable and can be refilled with different liquids, allowing users to customize their experience. Many people choose vape pens as an alternative to traditional cigarettes or for recreational use.