Print it! Grind it! You know what to do. Attaches to those small mason jars. No supports needed. Two options. One that uses magnets and one that doesnt. the magnets used are 8mm diamiter and 2mm tall. I got them from Harbor Freight.
If you burn PLA residue (along with whatever herbs you ground up :-) it will, amongst other things, emit Aldehydes. These are not good to inhale - https://cfpub.epa.gov/ncer_abstracts/index.cfm/fuseaction/display.abstractDetail/abstract_id/2313/report/Fwill
It's unclear how much PLA will be involved and the lev el of Aldehydes but in general burning plastic is not a good idea and you can't be sure what else was added to the PLA to color it or make it flow better.