Introducing our latest innovation, the Portable Smart Usb Mug Warmer Cup Heater Coffee Warmer Coaster For Home Office Desk. Keep your coffee, tea or hot cocoa warm and enjoyable longer with this USB cup warmer. Our factory designed this product with convenience in mind, making it easy to use and transport. It's perfect for use in the office or at home. With its compact and portable design, bring it with you wherever you go. Keep your beverage at a consistent temperature without any hassle or fuss. Trust our brand for durable and long-lasting products.