ing vap.>> i just got progressively better and better and better. >> but not everyone sticks with ecigs. for one e-cigs don't have the heat of conventional cigarettes. but those who have converted say the health benefits are worth it including the potential to wean yourself out of nicotine. customizing, mods are not only refillable but often feature variable voltage batteries. >> i can customize the amount of draw, if the colder hit, if it's a warmer hit, as well as that's just one piece of the puzzle. there's like hundreds and hundreds of variations that you can make. >> the liquid in the e-cigarette canister can contain anything from concentrations of nicotine from zero to 25 or 26 milligrams to juicing. and there's fruity flavors. here is where the controversy lies, critics are concerned that these attractive fruity flavors can help young people who stars vaping e-cigs, >> this is yoga land of e-cigs. >> it actually smells like pizza. i would eat this. for me because of my background that's