Engel coolers? asking baitkiller ...

Does anybody know of coolers which interlock end-to-end, perhaps tongue and groove style?

Or how about boat dock boxes?

I haven't seen any that fit like Legos but Yeti Tundra coolers have squared off corners with holes for pad locks that could be used to pin several together.

Like this:

Thanks. I think I can modify those for my purpose. I had seen interlocking portable plastic gas cans in a patent (US Pat No. 6719161 - Craig). I don't know if it were ever made and sold, but I wondered if there were anything like it for coolers (or other chest compartments). Here's a drawing from the patent (if I've sized it right).

16 - fuel cans.
105- tie downs
130 - bed of a pick up truck.
140 - wheel well