How is the insulin packaged when ordered in a 3 month supply from express scripts? I have always gotten insulin at a local pharmacy but it is getting a bit frustrating that they will only give me one vial of insulin at once due to supply issues so I have to go back a bunch of times. I'm just concerned about the insulin getting hot and/or freezing. Do they ship it overnight? I love the idea of ordering once and just having it come right to the door.