Refill stations? Like a faucet? When I was in Ghana, the street vendors there were selling plastic bags of cool water. Imagine something like a zip-lock bag. You would bite off a corner and drink it like that. The streets were absolutely littered with those bags. People would just throw them wherever and that has kind of become the culture. A running tap could do wonders for that sort of thing.

As far as objects floating in the ocean, container ships lose their cargo all the time. If there's a big storm or a faulty box, it'll just break off and go overboard. Do you know about the rubber duckies? That happened in the 90's and a lot of them are still out there. It's cool that it enabled ocean current research. It's even a little poetic. 30,000 yellow kids toys, floating in the worlds bathtub....

p.s. don't look now, but i think a mexican jizzed on your shoulder.