hi! i´m using the vapbong/ vaponic a few years now and as spare parts if they broke are not very cheap , i´ve tried to copy it. it works and i got a cheapo disposable vape. parts needed: 12 mm test tube with thick walls ( thin test tubes didn´t work good) or the original vaponic test tube (2-4 euro) 12 mm diameter wooden stick ( 100mm 1-2 euro) lufka style glass one hitter (0,5-2 euro) all you have to do is to heat treat the big openig of the one hitter mouthpiece and melt and schrink it. and cut of a piece of the wooden stick and drill a 3mm hole complete through it. at the other end you drill a ca 6mm hole 2/3 of the length. then you form a connection for the test tube at the site with the big hole. you have to file an air intake to the wood to get air into the test tube. at the other end you form a mouthpiece . at that point where the small diameter hole meets the biggger drillhole you make a small hole in the sidewall of the mouthpiece for cold air intake. place a screen into the one hitter bowl like in the oeiginal, put all together and you are ready to go.