INNOVATIVE COOLING DESIGN: This medical insulin pen cooler is designed to keep medicine cool while travelling safe with a USB lid that can reduce the internal temperature by up to 50°F, ensuring proper cooling without external ice packs, making it the perfect cooler travel case. ANTI-FREEZE TEMPERATURE CONTROL: Avoid the risk of freezing your medication. This medicine travel case cooler monitors temperature fluctuations and automatically adjusts to maintain a consistent range of 36-45°F, ensuring safe storage. REAL-TIME TEMPERATURE DISPLAY: This insulin cooler travel case USB-built in, operates quietly and features a real-time temperature display, so you can always know the current internal temperature and trust that your medication is kept at optimal conditions. LARGE CAPACITY STORAGE: With enough space to hold up to 7 insulin pens or other medications, this medicine travel cooler ensures that you have ample storage for longer trips. Whether on a simple city trip or in extreme climates, this diabetic case keeps medicine cool while travelling.