Holy adhesiveness, Batman!

Once I found out what it is, I felt really stupid. What does it say about me that, when I saw the empty package in the trash can, I started pondering what "multi-purpose bat tape" is for.

Splinting injured Chiropterans?

Shutting Robin's mouth to keep him from offering any more stupid interjections?

Taping up very small parcels?

Attaching notes to pigeons' legs?

I guess it being a trash can next to one of the campus baseball fields should've given me a clue.