I start with this photo basically because that little round hole is one of the most important and frustrating part of producing these simple but important pieces. What you're looking at is the nozzle end of a tube meant for extracting cannabis oil, or that's what we use it for anyway.
The idea is to pack it tightly with cannabis material and use butane to process out the beneficial oils, much like an essential oil compound full of THC and CBD and other compounds too.
This is one of those things that I thought would be easy as cake to produce, turns out it's not. Getting that hole perfectly round takes a trick of proper shaping and melting, but I've finally figured it out.
The end needs to be flared like that so you can put on a coffee filter and get it to stay, we generally use hairties for this purpose. This tube is part of an order of 12, 10 inch tubes but I'll be honest when I say the size varies despite my best efforts to keep things right. It looks like I've got a lot more of these in my future, at least 24 of varying lengths to be correct.
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