Glucology Zip Wallet holds: - 4 x insulin injection pens either refilled disposable or refillable pens; or - 15 x 3ml or 1.5ml cartridges; or - 6 x 10ml vials of insulin and syringes. 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.