I have a handheld one that you just plug into a USB-C to charge and has replaceable glass mouthpieces. The only maintenance whatsoever is periodic cleaning of the mouthpieces, which is much easier than cleaning a whole bong
We have a Mighty and a Volcano Hybrid, both from Storz und Bickel, the only maintenance we have to do is just to dissolve reclaim from the water pieces.
The maintenance has been a bit much in the past but maybe it was just my particular vape
I have a handheld one that you just plug into a USB-C to charge and has replaceable glass mouthpieces. The only maintenance whatsoever is periodic cleaning of the mouthpieces, which is much easier than cleaning a whole bong
We have a Mighty and a Volcano Hybrid, both from Storz und Bickel, the only maintenance we have to do is just to dissolve reclaim from the water pieces.