Where oh where is the messages in the bottles?

It seems some are quite hard to find. I've only found 4 or 5 of them, and I've got quite a few of those now, almost a dozen in each stack. Any idea what to do with the extras? Maybe I should give them as gifts or try and sell them on a market table. They are really cute decoration items too.

It would be so fun if we could put our own inscriptions on them and throw them back in the sea, so they could get dug up by other Sims again. I want to put my own notes from Tom Hank's character in Castaway in the bottles. "Wilson? Wiiiiilson?? ... I'm sorry ... I'm sorry Wilson ... Goodbye Wilson."