Keeps in-use insulin and temperature sensitive medication cool and safe - Simply activate with cold water - Light and compact - Reusable Suitable for carrying the following combinations of pens, vials and cartridges as follows: - 2 standard sized insulin injection pens either pre-filled disposable or refillable; or - 1 standard sized insulin injection pen plus 2 x 3 ml cartridges; or - 1 standard sized insulin pen plus 3 x 1.5 ml cartridges; or - 2 x 10 ml vials (bottles); or - 1 x EpiPen (Adrenaline: for emergency treatment of anaphylactic reactions).