Okay, just tried out the glass Dynavap caps. I happened to get a PT Glass all-glass Dynavap today too, all I needed to add was a cap. I couldn’t resist having a true all glass Dynavap (pictures below). I used the 1.25mm cap for all native hits and the 2mm for WPA hits, as directed in the instructions included in the packet.
On the all glass DV, taste was definitely better than a standard Vapcap but nowhere near in the league of Sticky Bricks or the Quartz Cap (Terpcicle testing is up next). But there was very little draw restriction which was really nice. I will say the heat was intense, and despite having a thick glass cooling stem it got very hot to the touch. The vapor itself remained mostly cool. This makes an effective all glass microdoser. For use with regular Vapcaps, I recommend having a strong cooling stem attached because it will be putting in work! I got four very thick hits, much thicker than I can usually get with my Vapcaps.
I then tried the 2mm cap with a 2019 SS tip on a WPA with no carb. This was no good, way too much draw resistance. I did get a huge milky cloud right on the first hit but it’s not worth powering through the restriction to get it. So I switched to my Hydravong with Ti tip and this was my favorite of all the variations. Much better airflow, the water piece soaked up all that heat nicely and I cleared it basically in one, I did take a second hit and it was much wispier. IMO this setup beats an FMJ or Armored Cap because there’s much better airflow, and it’s cool to see the herb get sucked down as you inhale.
ABV on all of these was very dark and even, but I never felt close to combustion. I did a single flame on the 1.25mm cap and a triple flame on the 2mm. I didn’t count for either of them, just looked for the flame to change to orange as it hit the glass.
The big winner for me is the 2mm through water on the Hydravong. Being able to clear the whole bowl in one hit is terrific and doing so with better airflow than any standard cap can get is very satisfying.
@RogueGuy mentions in the instructions that this is a beta, and I get that. I think both perform very well, I certainly prefer them over any solution that uses a regular metal cap, but I will say it does feel very niche. I think many Dynavap users may feel uncomfortable with the lack of click. I only felt as comfortable as I did because I have been using the Quartz Cap so much. And then having to find a place to safely put down hot glass is a factor too. I do think these are actually quite forgiving even without the click, I really had no fear of combustion, but if you do decide to sell them I think a notice in the description that these are for more experienced or adventurous vapists would be useful and I don’t know if there’s something inexpensive you could throw in to help users handle the caps on the cooldown but that would be a big plus for usability.
I will say these did make me excited to use my Vapcaps again, which I haven’t been excited about in a long time, so that’s already a win for me. I’ll be using these from now on without a doubt, especially for those intensely satisfying one hit clears on the Hydravong.
Edit: I did all these tests with CBD flower because I was doing so many back to back bowls and didn't want to be baked, and it still got me high! Not couch locked or shot into orbit but definitely in an altered state.