Waterfalls have a hole in the bottow, and water draining out sucks smoke into the chamber. A water bong is a regular bong...

I think I'll do a test and split the dro into 3 equally weighted sections, 1 for the bong, 1 for the vape, and 1 for the waterfall. I'll do a test on which gets me higher, and decide which I like better. Bongs are nice because of the ease compared to refilling waterfalls.