3W Healthcare - Diabetic Box - Large easily fits into a backpack without taking up a whole lot of space. Insulated cooler bag has pockets to store your Insulin Pen, Test Strips, Medications, Vials, and Ice Packs safely. Fits in one hand and easily fit in your luggage that work great for shorter trips. The fitted insert is removable so you can throw it in a refrigerator once you arrive at your next destination, and the design allows for quick and easy ice pack removal/insertion. , , Instruction: Put the 2 pieces ice packs in the Freezer more than 8 to 10 hours before using the insulin bag outside. Then put your insulin pen, refill, or insulin needles into the designated areas of the bag.