I'll just get more educated on the diabetic use of insulin, then if interrogated state that my grandfather needs it, we are from another state visiting family, he already has insulin but has one slin pin left. Write needle size and length on notecard and pull it out of pocket when she asked what kind i need to be more convincing. If denied use Lovbyts idea of asking for her name and write it down, to "Know whos responsible if grandfather goes into diabetic shock" lol .