You can purchase The Hammer vaporizer at: https://vaporizor.com/the-hammer-vaporizer.html
The Hammer Portable Vaporizer is a butane powered vaporizer that is small and discreet. It is shaped like a hammer (hence the name), the makers even include a nail as a screen cleaning tool.
The Hammer contains a separate path for the vapor, passing it through a stainless steel heat exchanger and then via a borosilicate tube. Butane exhaust is vented separately making sure that the vapor remains clean and uncontaminated.
By using butane a Hammer Vaporizer does away with the need for cords and batteries. Use good quality butane, available from most tobacco stores. The Hammer Vaporizer fits the most common canister tips. One canister of butane will refill the Hammer 40-50 times. The convenient viewing window allows you to keep an eye on fuel levels.
The Hammer Vaporizer has a small single hit size bowl, avoiding the need to use a lot of mix to fill it up. This is more efficient and helps your mix to last longer.