I use those deodorant stones....those crystal stones. Been using it for years. Cheap and it works great on me and one stone lasts over a year. No scent and it kills the B/O effectively.
I have been using them for 20+years. The stone somehow kills the bacteria that creates the odour. I am not a heavy sweat guy and I can get 48 hours out of one application.I've never heard of such a thing, but a quick internet search has me interested. I've loved the piper wai jars, but I might have to give those a try.