Thanks for the input, everyone.
So somehow the wood mouthpiece fits airtight against the other wood piece, but can't do so without an o-ring? I'm having trouble visualizing how that's possible. Wouldn't there still be a little gap where the hot air can touch the silicone? Or maybe the bottom of the mouthpiece sits flush onto a wooden ledge, while the o-ring secures it laterally?
I contacted Dreamwood and they said they were planning to add some more basic Glow models to the website, possibly with zebrawood. It's good to hear that is one of the more neutral tasting woods, and it looks very cool too.
I actually have no idea what you're saying lol
However I think you must misunderstand how the mouthpieces are connecting...
For my Glow 14, I have two options:
Glass stem (chamber / mouthpiece) inserted into the glow, use an o-ring around it that you press into the groove of the glow's wood body to seal and secure the stem. Fresh air still comes in from the bottom through the heating element through your herb in the stem to create vapor in the stem that you inhale from the other end.
Wood mouthpiece has an o-ring permanently built into it (sits in a little groove) so it can fit into the groove of the glow's wood body more easily without you having to press in (just a little twist). Fresh air still travels in the same way, however here you load in the body of the glow, on top of the heater screen, so you have a wood bowl and the wood mouthpiece is just a mouthpiece (vs glass stem where it is your chamber and mouthpiece).
Then what is different about the Glow 18 (yet what makes it similar to the Splinter) is that it has 18.8mm male ground glass connection. So the glass stem, is still the chamber, vapor path, and mouthpiece, but no o-ring is needed as the glow's wood body has 18.8mm female taper for the male ground glass stem (this is just like iHeat's glass on wood connection, whereas the Splinter is actually a glass on glass connection)
Then the Glow 18 also allows you to use the wooden jackpod stems though I am not sure exactly how they connect I believe it is similar to the Glow 14 wooden mouthpiece?
The new 22 is wood bowl in the body with separate wood mouthpiece using steel on wood connection... It's design, I mean it's usage style, is more similar to the vapor lighter and prrl neo though.
Hope that helps explain things for you better!
I of course think zebrawood is a great way to go, it is not too pricey yet still exotic, often looking super cool and unique, while tasting more neutral than many others quicker (most any wood bowl vape will take a bowl or two to a break in though)