The LifeinaBag12 medicine cool bag is a compact cool bag for medicines. The special design stores 3 standard injection pens for 12 hours at the desired temperature between 2-8 °C. Its light and compact design makes it ideal for traveling in your backpack or carry-on luggage. One cooling element must be frozen at -18 degrees for 12 hours prior to travel, ensuring optimal cooling performance. The medicine cooler bag has room for 3 standard injection pens.