Medicool DIA PAK Daymate has been the product of choice to keep your insulin and related supplies organized and portable. The DayMate is the most compact of the Dia-Pak family. Designed to hold any of the new Insulin Pen Systems or traditional bottles and syringes it easily clips onto your belt or can be discreetly carried in your pocket or purse. Made of water resistant durable nylon the DayMate includes a FREE Cold Gel Pack for use when temperature extremes are a concern.