FreeMax Twister Cap

thingiverse

I'm fed up with things slipping into my vape pen every time I put it in my pocket. Give it a test run for around seven minutes, then stop and remove part of it to see how well it fits. Since different devices have varying amounts of play, it might be either too loose or too tight. Make some adjustments by scaling up or down by one or two percent to get it just right. You want a snug fit, not a tight one, or the mouthpiece will come off when you remove the cap.