"A vapouriser is a device used to heat dried cannabis. There are no devices in the EU or UK authorised for medical uses. Pens are discrete devices and capable of vaping small amounts. Care must be taken to ensure it does not overheat.
Portable vapes are convenient for travelling, with the majority being rechargeable.
Desktop vapes are larger tabletop devices that are very efficient at ensuring the least amount of loss of chemicals from each dose of dried cannabis. They are typically more expensive but give a potential saving in the long run as less cannabis is needed per dose as compared to portable vapes or pens. "