Since 1989, Dia-Pak® has been the product of choice to keep your insulin and related supplies organized and portable. Constructed of durable nylon, the Dia-Pak Classic organizes up to a 1-week supply of all your required diabetic supplies in a variety of pockets and storage compartments. A FREE cold gel-pack keeps your insulin cool for hours and is easily refrigerated. Refrigerate for 3 hours, stays cool up to 12 hours. Water resistant and extremely durable, the Dia-Pak Classic will give you years of service.