I have 3.5 ml (now aparently termed the Big Gulp?) cartomizers that can hold anywhere from 2.5 to 3.5 mls of liquid depending on what you are measureing with that will NOT leak into the unit once filled ... Two of these puppies in your bag or pocket and your good for at least a day...
Its really hard to compete with the Reo as far as a Road Dog PV...I have a couple of them myself and I am ashamed to admit that they out do all my other mods for the car...Its absolutely the nicest, most functional solidly built bottom feeder on the market. I have never had as much as a drop of liquid spill out of any of mine. I can feed them with my eyes closed and the 18650 high drain delivers 12 to 18 hours of vaping...
Now that being sad, I can put a Big Gulp 3.5 or a Jumbo Dripper on My Darwin and go a couple hours without dripping and visit all the settings I want and make any atty do any tricks I want them to do...I have never been able to fall in love with any of the CE2s or the tanks that fit them and truly beleive they have a couple inherent flaws that cant be fixed without a complete redesign. Thats not to say that many dont like them. There are many reports that people are enjoying them but when I inspected the ones I used I found and tasted melted plastic which I am not comfortable using or selling....There are some new Clearomizers on the not so distant hroizon that I will be carrying and I think people will like.
I also think the whole Clearomizer (I can see my liquid) craze is a little more cooolness factor and hype than, form and functionality, but thats just my opine. At the end of the day I want a functional, flavorful, cart whether I can see the liquid or not....I really love the concept of the Tanks on the market and have tried them ALL, but unfortunatley they are (with few exceptions) built around the CE2 Cartos. If you are using a Reo with LR attys and you try vaping a Tank, you in for a flavor let down.
Im not trying to compare these but I hope I gave a good comparison. Thanks for your interest.
Drew