Would a plastic box along with heavily wrapped gorilla tape around it, survive underground as a time capsule?

Question:Time capsule survival without interior objects being destroyed. (biodegradable?)

Answers:
I'd do that and then put the result inside an airtight metal box, such as an old military ammo can. They can be found at any surplus store or gun show.

That's a neat thing you're doing, good luck with it.