Yeah if by one hitter you just mean chillum onie bat etc. Then there are many styled like this, my favorite are electronic glass stem-based pure convection vapes, the chamber and pathway is basically a glass chillum, you can kill the bull in one hit or take several puffs, but the form factor is similar... Dynavap has a similar style to that, tiny one hitter like from a dugout (they even used to sell dugouts for them and probably still do) but I don't enjoy the experience much at all personally... There are many competitors now like Anvil, Dani, Vector, Convector, and now Thermal Accumulator, Stunner, 18mmKiller, using balls, but Piro and others for direct torch pure convection can have similar styles too... BAK does too conduction