This stainless steel mug, which can be connected to a USB port or a car's cigarette lighter, keeps drinks at approximately 90°C for 2 hours, maintaining a temperature above 60°C. Capacity: 400ml - Brand: FUJI LIFE - Type: Stainless Steel Insulated Mug - Power Source: USB connection - Heat Retention: Keeps hot drinks at approximately 90°C for 2 hours, maintaining a temperature above 60°C - Usage: Connect to a car's cigarette lighter Thank you for viewing.