[A Navy Vet]

There's a big difference between E-cigs (trade name) and Blues (trade name). I've tried both and found the Blues while needing to puff about 3 times to get the taste put out no odor. It's just water vapor. The E-cigs are much stronger and I can smell them after just one puff. While stronger with just one puff they are a hassle to deal with the oil and filter that needs periodic cleaning.

I'm almost down to nothing since the Blues. No one, I repeat no one has ever complained about the Blues, even outside of restaurants. You cannot smell them, period. Anyone who says they can is having a psychosomatic response.

[laplata]

It’s just water vapor. The E-cigs are much stronger and I can smell them after just one puff.

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Unless you are thinking of another form of vaping, e-cigs have no odor.