Keep that mug of coffee, tea or cocoa warm all throughout the work day — and your devices charged and ready to go — with these warmers with four USB ports. Made of ABS plastic, these 4.14″ x 3.55″ devices have a round design with a USB power cable. Plug it in to a device port or charger to heat things up. The four additional USB ports are suitable for all of your charging needs. Works with heat conductive materials like ceramics or metal. Silver color. Add your organizational or company logo or message to customize. Orders of 10,000 pieces or greater are eligible for sea shipping.