No, but I can post a link for you! http://forum.grasscity.com/toking-tools/965167-how-make-true-gravity-bong.html
Lol I have a cute little gravity bong with a little bottle and a cup of water and a nice gromet seal with my sneak a toke for the bowl. Kinda stupid cause you only get a hit the size of a pipe but still kinda cool.