As I think the height of the device is one of it's greatest strengths, I wouldn't use it. But if someone does consider it a negative there is this option...(Emphasis added)
Less than half, in my view.
My wife and I were at one of the local tobacco/vape stores and I just happened to see these (stainless, white and black, I think) under the glass and the black one caught my eye. Asked about it. Read up on it. Went back several days later and bought it. The thing has performed flawlessly for me, with both max VG and 50/50. Doesn't take a metric butt-load of power or juice to produce nice flavour and density. Tobeco's coils are about 2/3 the cost of The Other Guys' coils.
I like RTAs and RDAs, but I gotta say: This tank is one of my best vape purchases. Only down-side: The drip tip being integral with the top, so you can't use the one of your choosing. Not a big deal, to me, but it might be for others.
https://ecig-city.com/shop/mini-super-tank-510-adapter-tobeco-mini-super-tank/