The Sinuous SW mod is a great little tube-style built-in battery mod that can fire coils down to 0.1 ohms. It features a large built-in 3000mah battery so it will last for quite a while even with low resistance coils.
The mod is 28mm in diameter with a 25mm 510 adapter, so can easily fit many different sized sub-ohm tanks, and works perfectly with the Elabo and Gnome, both also made by Wismec.
Those tanks will suit the style of the mod, which is unique and quite nice. It has a sleeve that can be unscrewed and swapped out for a different colour, as well as a large square firing button. It feels solid in the hand.