A Tube Vaporizer is almost the same as the bubble vaporizer, except that it is smaller in size. However, tube vaporizers have proved to be far more efficient.

The tube vaporizers work with a heat source placed below the vaporizer and the herb placed at the end of the tube. Then the user has to suck the vaporized air through the tube.

These vaporizers have a similar problem as with the bubble vaporizers. If the heat source is too close, then there is the possibility of combustion of the herb, which means you would end up smoking and not vaporizing.
Tube vaporizers do work and they are inexpensive too.

Advantages
• They are inexpensive
• They are portable

Disadvantages
• If the heat source is too close, combustion can take place
• Possibility of being inefficient at times
Tube vaporizers are considered to be much more efficient when compared to bubble vaporizers.