Social networking in its oldest form
26 September 2011 Last updated at 08:28 BST
Over the last two decades, Harold Hackett has sent out over 4,800 messages in a bottle from Prince Edward Island, Canada's smallest province along the Atlantic coastline.
Every message asks for the finder to send a response back to Hackett, and since 1996 he has received over 3,100 responses from all over the world.
In this First Person account, Hackett talks to the BBC's Franz Strasser about the items people have sent him and the unexpected side effects from his hobby.