Large Storage Capacity for Medication - This portable insulin cooler case is designed for efficient storage, easily accommodating 3-4 insulin pens, syringes, alcohol pads, and other essential items for diabetes patients. It ensures you can carry all your necessary supplies with ease. Long-lasting Cooling Without Electricity - Equipped with two large ice packs, once frozen for 8-12 hours, they can keep the temperature between 35.6-46.4℉ for 3-6 hours when the outside temperature is below 86℉. Your insulin stays within the safe temperature range wherever you go. High-quality Insulation Materials - The exterior is made of durable EVA material, while the interior uses aviation-grade heat insulation pearl cotton, offering excellent waterproof performance and efficient temperature maintenance, ensuring your medication is safe. Fahrenheit Temperature Display - Featuring a Fahrenheit temperature display, this insulin cooler travel case allows you to monitor the internal temperature in real time, giving you peace of mind that your medication is stored correctly. Easy to Use - Instructions: 1. Freeze the ice packs in the refrigerator for 8-12 hours until solid; 2. Place the medication and frozen ice packs in the case to start cooling. Note: The ice packs are reusable for 3-5 years and can be stored in the freezer for future use.