It's pay day and my lungs hurt. So I'm finally deciding to try the cancer free route. After some research, I realized what I need/want from my first vape: NEED- `convection `temp control that's reliable `usable with dry/loose leaf `material quality- glass, ceramic, mesh (does anybody have advice on what works cleanest for loose leaf?) WANT- `vapors only produced when taking a hit (is that the same thing as convection?) I didn't pass 6th grade science... `affordable? but durable! `USB/cigarette charger (for car)...if it is possible to get one that won't wear/tear radically fast `usable with essential oil `good to share with a few people AKA not super small Is there a product out there??? Sometimes it's hard to tell if a device is convection vs. conduction THANKS A LOT!!!