Last year a threw a bottle in the ocean with my contact information in it after reading an article where a student in Florida did the same. After two years his bottle ended up washing up on the coast of Ireland. I thought maybe I could get my bottle to go a few miles, but I still haven't heard back yet. That is either a pretty cool thing (it is still on its way), or it is not so cool (it sank). Maybe I'll throw another for safe measure.