I, myself am a lung connisure. I smoke lungs 80-90 percent of the time. Best for indoor use. I found the best bag to use is a milk bag, as it is perfect size and durable. You might have to stretch the openeing to pull it over the bottle but DONT RIP IT. I usually cut the bottle half way or a little less. I have a pipe bowl melted into a cap and away i go. I can make a perfect lung in like 4 minutes.

The best thing about lungs is they conserve bud whilst getting you very high. You can also hyperventitlate your toke a few times in the bag to increase high and reduce smell or even share tokes to save weed. I like it cause all the smoke goes into the lung(if u put in the right amount of weed) and then into your lungs, then into your jail toker/gas mask cansiter, thus reducing the scent cause no weed is burning off.

I have also made lungs with a water filter bong on the side to filter the smoke making u cabale of much bigger hits. This is a nice add on but makes the lung bulky.

I recomend lungs to anyone and everyone.