How long does vapor last?

[drhgood]

New to this and wondering how long a bag of vapor is good for?...Can you fill a few and use them all day?

[Euphoric7]

Hmm... I'm not sure; but I'll have to guess that the vapour is only good until it cools down and _isn't_ vapour anymore.

[vapefiend]

Vapor condenses on cooler surfaces (pretty much anything it contacts) and dissipates too. Vapor in a bag will last a while, but after 30 min. to an hour you've lost a significant amount.