Well, I own one, so I've seen one in person
I'll try to record a vid for ya, but it probably won't be for a few days.
It's a pretty small piece, the ID of the can is pretty close to 18mm.
I like its "convertible" style, where it has a regular upwards facing joint in addition to the downward facing hydratube joint.
It means you can either use it as a hydratube, with a built in cloud buddy style carb stopper, or you can use it like a regular bubbler, by placing the stopper (or hydrafoot) in the bottom joint.
I'd actually like to see VXL add a hydratube to their line that has something similar...
And it's Got a removable mouthpiece, so with an adapter you could throw another hydratube on top of it (though I've never found the new to do so
)
The piece has some drag to it, due to it being such a small frit disc, I don't mind it, but I recall reading another member saying they weren't the biggest fan of it...