I don’t use it. I also thought it was a dugout like a one hitter. If you put the pen in there the cap sticks to the bud and then won’t come out of the dugout. I guess I could try a spring. But honestly, I just put the pen in my pocket, the cap stays on fine.

Fwiw, the dynavap m is the best vape I’ve ever used. It’s the closest thing to smoking that isn’t smoking. I am so in love with this thing and I’m saving so much $$ not using as much flower.