I use this one>
Aspire - Aspire Cleito Tank
Best one I have used, I have used a bunch and this one is worth it, if it ever broke id buy the same one. you can take BIG puffs of clouds, most vap pens are small and dont do it for me, like trying to breath through a tiny straw for a small little puff... but there are 2 types of vaping people; mouth toke and inhale, or mouth to lung tokes (straight from vape to lung draws) and the the latter you usually need a bigger and advanced vape. im the latter.
*started smoking only a couple years ago like a dumb ass (did like 20yrs ago for a couple years in highschool but stopped)... I have had a very very rough last couple years in my life, but things are flowing now and iv stopped smoking and just vape (for the most part, odd times ill roll a natty organic tobacco blend but its rare)