Right now there is no carb per se because your pen tube goes under the level of the water. If you cut it shorter so that it doesn't go under water, then you'll have a real carb so you can clear the smoke without having the clean air bubble through the water first. The way you have it set up right now, even if you take out the bowl/funnel, when you try to clear it, the clean air still gets bubbled. Other than that though, niiice idea with the funnel, I have one lying around from when I was jacking shit from high school too, haha.