USB Cup Warmer - Wood Grain | Kalsten
3 Colors USB Wood Grain Cup Warmer

Features:
- Made of high quality walnut wood and metal materials, heating evenly, safe and durable to use.
- Powered by any devices with output 5V USB port, such as your computer, desktop, laptop, tablet, mobile power and so on, easy and convenient.
- Light weight and compact size, easy to carry and suitable for most stainless steel cup, feeding bottle, ceramic cup, glass cup, etc.
- Keep your coffee, tea or other hot beverage warm up to 80°, do not worry about high temperature and high oxidation, safe in use.
- Great for use at home and office, keeping you brew warm on cold days.
Specification:
Main Material: Wood + Metal
Power: 5W
Voltage: 5V
Electric Current: 1000mA
Max Working Temperature: 80°
Wooden Grain Width: Approx. 16mm / 0.62inch
Metal Plate Diameter: Approx. 75mm / 2.95inch
Whole Diameter: Approx. 103mm / 4.05inch
Weight: Approx. 108-109g
OUR GUARANTEE
If you don't have a HAPPY shopping experience, contact us at support@Kalsten.com and we will make it right for you so that you're 100% satisfied.
There's absolutely ZERO RISK buying from the Kalsten official store - so send us an email if you need any assistance.
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Free standard shipping on all orders. No minimum purchase.
- Ships to: United States
- Processing: 1–4 business days (Mon–Fri)
- Transit: 5–10 business days
- Total delivery time: 6–14 business days
- Order cut-off: 5:00 PM PST
You will receive a tracking number by email once your order ships. Please allow up to 48 hours for tracking to update.
See our full Shipping Policy.
You have 14 days from delivery to request a return.
- Email support@open.shop with your order number to start a return.
- Items must be unused, complete, and in their original packaging.
- Return label: flat $9.99 USD, deducted from your refund — nothing to pay upfront.
- Damaged, defective or incorrect items: we cover all return and replacement costs.
- No restocking fees.
- Exchanges: contact us and mention "exchange" — the new item ships once your return arrives.
- Refunds are issued within 7 business days of inspection.
See our full Return Policy.
Questions about your order or our products? We're happy to help.
Open
Hooizolder 214
Drachten Friesland 9205CD
Netherlands
Email: support@open.shop
Customer Service:
Monday to Friday, 8:00 AM – 6:00 PM PST (excluding public holidays)
We reply to all messages within 24 hours on business days. Weekend messages are answered on Monday.
For quick answers, visit our FAQ page or use our Contact Form.