Medicool Protectall simply refrigerate or place the cooler in a cold bucket of ice for a couple of hours prior to use. Traveling has never been easier. The Medicool ProtectAll® keeps your insulin safely cool for up to 12 hours. The cooler accommodates two bottles of insulin, or a Pen System and two spare Pen bottles. For day trips it can hold a prefilled syringe or two. Additional compartments and pockets securely store your syringes, meter, test strips, lancing device and lancets, etc. Internal vinyl pockets hold credit cards and personal ID.