I have a chrome cupholder on my handlebars on my HD Road King. I put my Provari in that and vape as needed.
A Lanyard would be OK if you found one built pretty well. Ive just not found one I like for my mod.
Or if you know an orthodontist maybe he can rig something up for you.
Or even an orthopedist.
I've been trying to find a good holster myself lately. It's a real pain in the ... trying to keep my Zen upright and having to hand carrying it all the time. I had started looking for one when I just had the Provari but now the Zen is my ADV and I'll need to find something that won't push in the firing button since there's not a lock on it.
Mods: GP Paps Lux 2.5; Paps X Ti; Paps X Lux; Paps X SS
Atomizers: Herons and Spheroids; Versa Hybrid Dripper
If you are a craftsman, make your own. Kydex is easy to work with. I have made several knife sheaths out of it and my wallet is made from it, also. It's just a front pocket wallet, but it holds all my ID/cards/cash I carry.