AtmosRaw Bullet 2 Go
This is possibly the smallest most portable vaporiser on the market at the moment. It runs off a lithium Ion battery that is charged through a USB charger. So is truly portable and charged quickly and discreetly through your laptopnetbook.
The mouthpiece has a spring in the lid to make sure your chosen herb is pressed against the heating element. If you want to use waxy extractssimilar remove the spring from the mouthpiece and use a suitable wax tool to load the vap chamber.