Drippers (or RDA's - Rebuildable Dripping Atomisers) are rebuildable atomisers that don't have a tank. Dripping is a form of vaping, but instead of filling up a vape tank as you normally would, you drip a small amount of e-juice directly onto the wicked coil or bridge of your RDA atomiser. Some find this method impractical, considering the fact that the e-liquid is evaporated after a few tokes, it has to be re-dripped frequently. Also, drippers have to be built and wicked by the user, not ideal for new vapers.
There are advantages to using dripper vapes, especially to the more advanced vaper. Let's take a look at the pros and cons of drippers: