Welcome to ECF . One of my dily PV's is a Provari . Just got a few items from Gotvapes . One of the is a new tank system , comes with 2 extra coil/ wicks . Real easy to change . Top and bottom caps , screw on , so very easy to fill and/or change out the wick . And so far , so good . No leaks and tons of vapor at 3.7 volts with a 2.5 ohm wick/coil . Even better at 4.3 volts . Forget the cost , but around the 10 or 12 dollar area . Probably my go to tank , othe r than my re-buildables .