Okay. I couldn't think of any thing cool to use for a fantasy diabetes device, but here goes nothing.
Or how about an Iron Man suit? It may be a little awkward to wear, but just imagine how cool it would be to have this suit, and you can use the chamber in the chest to store a vial of insulin so you can always be prepared for battle with diabetes! Not to mention, that is one badass suit so the D-Police will not mess with you at all.
We can be the silver surfer, so whenever we're feeling lonely with diabetes we can teleport to our D-buddies to cheer us up and give us some motivation.
Now, those are all outlandish, but that was the point of this. I wish we could combine all of those abilities together to become a hat wearing, Iron Man suit donning, Silver surfing super hero on our way to diabetes bliss.