Product Description: Material: PU, heat-insulating cotton Dimensions: 90mm, 120mm Suitable for bottles with a diameter of 6.5-7cm Color: High Yellow, High Green Quantity: 1 piece Package Contents: 1 x Vacuum Bottle Warmer 1 x USB Charging Cable 42°C Constant Temperature: Made of heat-resistant materials, safely insulated. Maintains a constant 42°C, effectively preserving the nutrients in milk. Faster Heating: Uses an imported temperature sensor chip for precise heating. With 9V/10V adapters, it takes about 20 minutes to heat 200ml of water from 25℃ to 40℃. With a 5V/2A adapter, it offers heat retention or slow heating, intelligently maintaining a constant temperature (takes 40 minutes to heat frozen milk to 42°C with a 5V/2A adapter). Suitable for Various Materials: Heats plastic, glass, or stainless steel bottles. The surface remains cool during heating; automatically switches to insulation mode at 42°C, supporting 24-hour continuous insulation. Application Scenario: Ideal for travel, airplanes, trains, and cars. Easy to Clean: Made of PU material (not waterproof). Clean with paper towels or wipes. Do not submerge in water.