I was thinking something like those home made lightbulb vaporizers? maybe you put the bud in and heat the glass like that. i saw one of these at a headshop and the guy didnt know what it did either. haha
It actually looks like some type of vape-pipe. Put the weed in the end of the big end, put the small end into it(over the weed) and then maybe use it like a pipe, lighting infront of the whole thing i guess.
You use it just like a bong expect without water of course. When the smoke fills up the pipe you pull the slide out.
It's a chillum with a slide. You hit it like a chillum, and then pull that end piece out like you would with a bong. Kind of un-neccecairy, but cool.