Fahrenheit Temperature Display - Our insulin cooler travel case is equipped with a Fahrenheit temperature display. You can clearly observe the real-time temperature inside.Insulated Cooler Bag for Travel - This portable cooler bag for diabetes supplies uses EVA as the outer material and aviation insulation pearl cotton and aluminum foil lined insulation as the inner material. It has good waterproof performance while maintaining temperature.Keep Cool for a Long Time - No electricity required. There are two large ice packs (TSA approved), after the ice pack is frozen for 5-8 hours, when the outside temperature is below 86 , it will keep the temperature at 35.6-46.4 for 5-8 hours. Our travel medicine cooler can keep your insulin at low temperature (below 74 ) for more than 24 hours.Large Capacity of Medicine Storage Space - The scientific storage method enables this diabetes supplies bag to store more medicines. This medicine travel cooler can easily accommodate 3-6 insulin pens and syringes, alcohol pads, cotton balls and other items for blood sugar patients.Instructions - 1. Put the ice pack into the freezer for about 5-8 hours until it hardens 2. Put the medicine and refrigerant into the bag together and start cooling. Note: The refrigerant can be reused for 3-5 years and can be frozen for future use when not in use.