Every diabetic almost always carries a "kit" that helps keep his blood glucose under control - insulin, glucometer, strips, spare needles and lancets, accessories for an insulin pump, or a small sweetness to ward off hypoglycemia. With covers and pen cases, you have all these little things together and quickly accessible. You will no longer wonder if you really put everything in your backpack and handbag, or dig the length of your bags for a long time and rearrange them to find something inside. In addition, covers and pen cases will keep your insulin cool even during a hot summer or vacation.