Looks like the gelatin they use for potted and canned meat. I can honestly say I've eaten weirder and grosser food than that. Filipino food can get kinda out there if you're not raised with it.
Hey!!
We used apples and tin foil as bowls when we were kids or sometimes aluminum cans just folded over. @ANC had a cool story about using bottle necks carefully broken off. It sounds really cool and I might try it for fun sometime.