Design Your Own Message in a Bottle Necklaces (12 Pack) Craft for Kids A message for help? A treasure map? Or future hopes and dreams? You decide! These DIY crafts are great fun for ocean or pirate theme birthday parties or our "Spirit Of The Seas" VBS. Our Message In A Bottle Necklaces are a perfect all ages activity. Write down whatever you want your message to say. 1 Dozen per unit Our Do It Yourself Message In A Bottle Necklaces has everything you need including plastic 3" bottles with cork, sand, 28" jute strings, 6" ribbons and paper inserts.