Homemade Multi-Chamber Bong Problems...

Well I made a multi-chamber bong. It has 3 chambers made of Sprite Bottles (Not the 2 Litre ones, the Smaller version). I used 2 straws (Small white minute maid juice straws) for each bottle to connect them to each other and its pretty much airtight. Now heres the problem (Or what I think is a problem..) When I inhale the flame is sucked into the bowl, Great, at least I know its working properly to some extent. Now when I put my wee in there and Inhaled, the flame was sucked into the bowl peice and the weed lit up. I was inhaling really hard and I didnt even feel the smoke enter my lungs or nothing. At first I thought it was normal because the smoke had been cooled but when I went to exhale my hit...nothing came out of me mouth. I only held it for like 3-4 seconds. I tried again with no luck. It seems as if the smoke dissappears somewhere in the bottles. Whats kinda funny is that I took 2 hits and I am experiencing a slight buzz but nothing bigger than I should be experiencing. Any help is appreciated guys. Ill try to put up a picture.

Thanks in advance.

Alright here it is...sorry for crappy quality I was using my Webcam...

its probably not airtight, use a bunch of chewed bublegum (wrigleys) around the areas where it needs to be sealed. remember, "AIRTIGHT" is the name is the game

no wonder people look down on marijuana users! if you had no experience that would look like some crazy tweeker shit!
imo you should make something else.
homemade, yes. bottles, no.

oh and no plastic downstems!
lol

Save up your milk money and buy a real bong..

well your first problem is that youre putting you wee in the bowl...whatever god gave men a wee for, its not for sticking in bowls...

no but seriously, whats happening is probably its not very aritight(tape is NEVER airtight!) and the smoek is getting very thin to the point that you cant really see it in teh bottle or nothing.

id also reccomend ditching the bottles though, if you really wanna make a cheap home made bong, make a waterfall bong out of a sobe bottle(if you dont know what that is....google it)