I'm personally loving my Hana Modz Mini. It's a dna 20 mod but the dna 30 version should be out within the next week or so. It's a box mod but nice and small that has a recessed drip well that sits all toppers nicely in the mod. Our the Vapor Shark dna 30 should be out mid Feb. This will be a big year for DNA devices.
If you want a tube mod then you can look at the NexGen Futura DNA 30 but they can't seem to get their Quality Control consistent. The ZNA mod is kinda of a Tube mod with a DNA 30.
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Well, who wouldn't love a Hana Modz! But I think the OP was inquiring about a telescoping VV/VW device
With that said, the only ones that comes to mind would be an innokin SVD, Sigelei Zmax or Spire mod.
Just wanted to add since I'm in this thread, I picked up a coolfire 1 for my wife who wanted a simple, press the button and vape mod that has more power than an ego battery and purse friendly. Threw my 1ohm RDA on to see how it vapes, and not bad at all! Battery life would be an issue for me if I used this regularly, but for a 1.8ohm or higher clearo/carto, its a perfect little device.
Its definitely a nice mod, but no surprise being an innokin product