Fahrenheit Temperature Display - Our insulin cooler trael case is equipped with a Fahrenheit temperature display. You can clearly obsere the real-time temperature inside.Insulated Cooler Bag for Trael - This portable cooler bag for diabetes supplies uses EA as the outer material and aiation insulation pearl cotton + 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 approed), 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 trael 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 trael 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.