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.
vapefiend Reviewed by vapefiend on . How long does vapor last? New to this and wondering how long a bag of vapor is good for?...Can you fill a few and use them all day? Rating: 5