HEBA diffuser is the best thing that happend to my smoking sessions..
if you check out the review section, go under "everything else" and push the "thread" button so it will catogeraize the threads i alphabetic orde.r. you will find HEBA diffuser there..
since I am feeling good today ( because of sunny weather ) I will link to it!
I recommend reading my post there for the best insight on what it actually does and why it is good!