USB mug warmer

Made of high quality aluminum magnesium alloy and glass material, sturdy and durable to use Adopts PTC thermostatic material for heating evenly and quickly, with less power consumption Lightweight and compact size, easy to carry and store Suitable for most stainless steel cups, feeding bottles, ceramic cups, glass, etc. Keep your coffee, tea or other hot drink warm at a perfect 55 ℃ Ideal for home and office use, keeping your drinks warm at all times!