How about a recycling center?

[someone_cool_was_here]

What else can we do with those tires and cans? And the boots; you can't even wear them, and I could use a pair.

[Isis_de_Leon]

thats gonna be comming soon.. and they do have a recycling center at the center square

[Enkyubus]

You go to the The Ole Fishing Hole and trade them. Unfortunately, it seems to be a bit glitchy.
Gaidin's Fishing Guide.