I have often desired a vapor free e-liquid for stealth situations. We are aware one can hold the vapor in the lungs for a period of time to produce that result. There is a certain vendor now offering a vapor-less e-liquid. I was excited. I assumed puffing away at a normal rate and nothing being visible. There is a video and I believe it is a scam. One is showed lung inhaling the liquid with no vapor. Then mouth inhaling with a limited vapor. One must lung inhale according to the video to produce the no vapor effect. Huh? I tried a 70pg/30vg liquid with exactly the same result only I did a mouth inhale with no vapor holding about 10 seconds. OK so now I did my quite high vapor 80%vg blend. Yup no vapor if I mouth inhaled and held it a few seconds longer. What a marketing ploy.
