Key benefits Keeps drinks hot or cold for 10–12 hours: vacuum insulation preserves temperature over long periods so your coffee, tea, or other beverages stay at serving temperature without added power. Clear, reliable function: this is a passive insulated coffee warmer — physical insulation only, no electrical heating element or plug-in function. Durable, odor-free materials: double-layer stainless steel construction with PU foam insulation offers a sanitary, long-lasting interior that does not retain odors. What makes it stand out Double-layer stainless steel body for strength and temperature retention. Encased in PU foam insulation to improve thermal performance and impact resistance. Designed for everyday use: large opening for easy filling and simple cleaning. Features and performance Thermal performance: vacuum-insulated design maintains beverage temperature for approximately 10–12 hours. Construction: double layer stainless steel interior and exterior, with PU foam insulation between layers. Safe and odorless: materials selected to avoid flavor transfer and retain beverage quality. Easy to clean and fill: wide mouth opening simplifies pouring, adds convenience when adding ice or milk, and allows fast wiping with a sponge after use. Recommended use scenarios Office desk: keep your coffee hot through long meetings and focused work sessions without reheating. Commuting and travel: maintain beverage temperature during a commute, road trip, or while waiting for a flight. Outdoor activities: suitable for picnics, hiking breaks, or outdoor work where electricity is not available. Practical notes This product provides passive insulation only; it does not include a heating element or require power. Clean by hand: wipe the interior and exterior with a sponge and mild detergent as needed; the large opening makes this straightforward. Materials and compatibility Materials: double layer stainless steel with PU foam insulation. Compatible with standard hot and cold beverages. Follow normal care instructions to protect the finish and insulation. This insulated coffee warmer is a straightforward, durable option when you need reliable temperature retention without electronics.