I personally have never owned one but IMO those donβt seem very practical for the average or even daily smoker. Because you would have to be someone who has a fairly decent quantity of smoke on hand on a regular basis. Secondly, I would think that it would expose your stuff to too much air and make it dry out to much.
If youβre looking to collect pollen and I assume that you are I would recommend a well made grinder with a pollen catch. And in that case I would recommend a spacecase grinder. They are kind of pricy but well worth the cost IMO. I bought mine here
http://stores.ebay.com/GRATEFULBUYS_...QQftidZ2QQtZkm If you donβt want the grinder they also have sifter case that would work much like the box. But I would recommend you get the grinder with the pollen catch. I also own their pollen press and a few of their stash containers.
If Iβm wrong about the box Iβm sure someone will correct me.
Hope this helps