USB Mug Warmer | Thermostatic Coffee & Tea Heating Coaster

Keep Your Drinks at the Perfect Temperature All Day Long

Say goodbye to lukewarm coffee and cold tea! The Raugee USB Mug Warmer (Model RY004) is a compact, thermostatic heating coaster designed to keep your favorite beverages at a comfortable, enjoyable temperature whether you're at the office, home, school, or dorm. Simply plug it in via USB and let it do the work — no complicated setup required.

Key Features

• 3 Adjustable Temperature Settings — Choose from three heat levels to suit your preference for coffee, tea, milk, hot cocoa, or any warm drink.
• Thermostatic Control — Maintains a steady, consistent warmth without overheating your mug.
• Waterproof Design — Built-in waterproof protection makes it easy to wipe clean and safe around beverages.
• USB Powered — Connects to any USB port on your laptop, desktop, power bank, or USB wall adapter. Includes a black version and a version with a 1m OTG extension cable.
• Lightweight & Portable — Slim, low-profile coaster design takes up minimal desk space and slips easily into a bag.
• Safe & Non-Toxic — Made from high-quality, odorless, non-toxic materials with CE certification.
• Versatile Use — Works with coffee, tea, milk, soups, hot chocolate, and more.

Important Notes

• This warmer is designed to maintain warmth — it will keep your beverage at temperature but cannot boil water from cold.
• Available in two configurations: standard black USB plug, or black with an included 1m OTG extension cable.

Made in Mainland China.

Perfect For

Office desks, home kitchens, student dorms, libraries, or anywhere you want to enjoy a warm drink without constant microwave trips. A thoughtful and practical gift for coworkers, students, or any coffee or tea lover.

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Authoritative Resource

For general electrical safety tips on small appliances and USB-powered devices, visit the U.S. Consumer Product Safety Commission (CPSC) for guidance on safe home appliance use.

Learn more: Drink

Frequently Asked Questions

Q: What types of mugs or cups work best with this USB mug warmer?

A: The USB mug warmer works with most standard ceramic, glass, and metal mugs. For best results, use a mug with a flat, smooth bottom that makes full contact with the heating coaster surface. It's ideal for keeping coffee, tea, milk, hot chocolate, and soups warm.

Q: Does this mug warmer heat beverages from cold, or just maintain warmth?

A: This warmer is designed to maintain the warmth of your beverage — it keeps an already-warm drink at a comfortable temperature. It is not designed to heat a cold drink from scratch or boil water, so we recommend starting with a freshly made hot drink.

Q: What do I need to power this USB cup warmer?

A: The mug warmer is powered via a standard USB port. You can connect it to a laptop, desktop computer, USB wall charger, or USB power bank. It's available with a standard plug or with an included 1-meter OTG extension cable for added reach.

Q: Is the USB mug warmer safe to leave on my desk all day?

A: Yes. The warmer features thermostatic temperature control that maintains a steady heat level, and its waterproof design adds extra durability. It holds CE certification, indicating it meets European safety and quality standards. Always follow general small-appliance safety practices and avoid leaving it unattended for extended periods.