A safe way to transport injectable medications that require cooling Medicool's PenPlus Case protects all your valuable supplies. Its stylish ergonomic design makes it the perfect case for men or women, as well as children, seniors, and medical personal. It can be attached to a belt, placed inside a purse or briefcase, or carry it usung the detachable hand strap. For Vials or Pens Cools for hours Protective pocket for meters and more Includes 1 Large Gel Pack When used with the Refreezable Gel Pack the PenPlus Case can hold up to four vials of insulin or two insulin pens keeping them safely cool for up to 12 hours.