The Volcano Vaporizer is the undisputed heavyweight champion of vaporizers. The Volcano vaporize heats the herbs with hot air and releases the vapour into a large polythene balloon. The balloon or bag has a valve on the end so that when you’ve taken a hit, you can pass it on to the next person. Each bag will give around 2-6 hits depending on your lung capacity. You will often see Volcana vaporizer bags being passed around in the best Amsterdam coffeeshops.