Allow me to do the math.
Let's just say, for every time you inhale, you exhale 50% thc. So if you inhale 3-4 times with a whip and about 20-25 times with a bag....
Whip Vap vs Bag Vap.
Whip Vap = More vapor in 1 hit, more THC lost when exhaling, usualy more weed.
Bag Vap = Less vapor in 1 hit, hardly any THC lost when exhaling, usualy less weed.
That means with a bag, you are hardly exhaling any thc because there's considerably less in every hit than with a whip vaporizer.
I mean come on, you don't see any whip vaporizers cost as much as the volcano. And i mean, using very little weed. The more you use, the more THC you will lose on the exhale.
It's all about finding the right formula with a bag that will allow you to finish it before the THC starts degrading and the right ratio for weed to air, so that your lungs inhale air as a majority and THC as a minority, which in turn allows the most efficient administration of THC without losing any when you exhale.