Bottle not included Adjustable frequency conversion. Intelligent temperature control design. Detachable buckle. Detachable buckle, adjustable according to the size of the bottle, simple shape, preferably leather, more sophisticated. USB charging. This bottle warmer supports mobile power, USB charging, and car charging. Take it with you, easy to use. Easy to clean. This bottle cover is easy to clean. Do not wash the warmer cover directly in water. Use a wet paper towel to gently wipe the stain from the skin. Good material. This milk insulated cover is made of high quality microfiber PU material, which is safe and environmentally friendly. Wear-resistant and durable. Packing list: 1* milk bottle insulation cover We only sell the milk bottle insulation cover, not the other items in the picture. Note: 1. Manual measurement, please allow a slight error, thank you 2. Due to differences between different monitors, the picture may not reflect the actual color of the item.