1Mini Insulin Cooler Travel Case: This insulin travel case is very convenient to carry medicine, you can easily take it when traveling without too much burden. 2Function of the Storage Box: The insulin cooler can ensure the safety of the insulin pen box, insulin needle and insulin pen needle, so that you can use it normally. 3Multiple Charging Methods: Our cooler housing can be plugged directly into any USB charging port with a USB charging cable while traveling, or any vehicle outlet or any AC adapter. 4Very Durable: Lightweight but durable, easy to transport anywhere, keeps cool and fresh, and has a reliable sealing performance construction. 5For Most Use Cases: Cooling performance continues throughout your journey. Keep your medicine full fresh, super energy saving! Meet most usage scenarios.