ok start with a hubba bubba bubblegum holder ( one of those containers that holds almost 2 metres of gum inside all rolled up. ) and make a hole in the top, and near the bottom of the bong, now take a regular straw, and tape it in place in the top hole of the bong, and then take your pipe, and stick it into the bottom hole where the water will be covering. now im guessing that the water will not go up the pipe chamber, as the hole is very thin.
also, if you want the flavour, you need a very fresh bubblegum container, otherwise the stong smell goes away over time.
i will try to get pics of my flavoured bong up tonight, and show you me lighting up
