Detailed Product Description Milk Bottle Warmer Bag,Milk Bottle Cooler Bag,Milk Bag,baby bottle bag,kid's bottle warmer:1. Material: There are two layers, you can print your logo or favourite picture on the surface, the inside layer is silver paper which can keep the tempreature of your milk or juice.2. Washable and durable.3. economic, but Useful.4. Premotional gift, or daily use.