PPN
Volute of Vapor
To be honnest I use mine more like a jar for grounded flowers of different strains although if I have to take a grinder on the go it is the Zam. It tends to be easily clogged if you use resinous moist flowers, the dryer the better for the Zam. Yes there is always some ungrouded bits stucked in a few holes, with a toothpick I push them back in the grinding chamber to finish to grind that bits. A little issue for a lot of convenience on the go!