not trying to shyt on those dudes but you can find discreet vaporizers for a better price. vapes that burn weed or hash oil.
personally i'd rather just use the kind that look like e-cigs but burns weed oil or dry herb. i mean how discreet is that pen really going to be? gonna look kinda odd sucking on the tip of a pen like that. i'd for something like this if you were looking for something purely off being discreet