High-quality materials: This portable baby bottle insulation function device is made of heat-resistant materials, which is safe and heat-insulating, effectively keeping nutritious milk warm and preventing it from getting cold.Level 5 temperature setting: Our milk warmer has 5 temperature modes.38°C, 40°C, 46°C, 50°C, 55°C (100.4°F, 104°F, 114.8°F, 122°F, 131°F). Different temperature modes can be selected according to actual needs.Suitable for different bottles: Travel bottle thermos bottles are suitable for thermal insulation of various materials, including plastic, glass and stainless steel.Suitable for night feeding: use the insulation function to maintain the temperature of the milk before going to bed (its small size makes it easy to put on the bedside table), suitable for people who feed late at night