Glucology Pen Pouch holds: - 2 x standard sized injection pens either prefilled disposable or refillable; or - 1 x standard sized injection pen plus 2 x 3ml cartridges. Glucology insulin cooling pouches: - Keep insulin cool for up to 36 hours per activation - Activate simply by immersing in cold water - Light and compact, prefect for travel - Reusable activate again and again.