I saw a Packzi. Won't tell you what it was floating in, because I don't know. But it wasn't anything I recognised.
Cool thing about those little donuts is you can fit three of them inside your duct tape roll, four and maybe five if you squish them and sit on them. Then you got your duct tape and your snack all in one place. The duct tape roll helps 'em keep their shape too.
You can use them in your oil filter too, and afterward, you gotta nice little dunked donut to nibble on. Again, they retain their flavor, even after 100,000 miles.