Lunch Boxes & Totes2018 cooler bag Portable Insulin cool bag Diabetic Insulin Travel Case Size:20*9*5 Late-model PU Fabric Aluminum Foil icebagThe insulin box specification:Size:length*width*high 20*10*4.5cmFeature:Shockproof,Portable,Anti-press,Good cold effect,Suitable for insulin refrigeration.we wouldsend fourice-packs, which should put in refrigerator for 6-8hours till it become solid, cold ice-pack keeps insulin cool for hours and is easily refrigerated.The water is injected into the ice packsto form a gelatinous substance.==gel-packHow long would the insulin box keep cold?yes,here are the answer:1.It cankeep cold for 8-16 hours between2-8Celsiuswith coldergel-pack .2.It cankeep cold for 2days at 25Celsiuswith coldergel-pack .on the train,in the car, it is very portable for you!gThe water is injected into the ice packsto form a gelatinous substance.==gel-packYou can inject 80 to 100 grams of water.