Picked up a Pico 25 and a GRRIV 2. No idea if they're crap, but decent enough price on them from the prices I recall from 6 years back. Jeebus are these atomizers huge these days or what?! Guessing that's why 60ml bottles are so prevelent these days. Back in the day 30ml would last forever.
I've got
three of the smaller
Pico 75 watt
mods (22mm wide) which I use with
Doggystyle RTAs when I'm out and about, and for all day use at work. The Picos are all very dependable and these tanks are about as small as you can get for a 3 1/2 ml tank. I've never had one leak in my pocket in I think over a year. With a 15 watt build in this tank, 3 1/2 ml lasts a while too. Very nice combination that scratches the itch for me just fine
How much
juice you use per drag depends mostly on the watts you are set at and how long your drag is. There are some pretty big tanks out there today, up to 30 ml capacity (and more is available), but they are not used by too many folks. Tanks will always be bigger than drippers on average, though the smallest tank is still smaller than the biggest dripper.