Vape tanks are tasked with holding your vape juice and the element called a coil that heats the liquid up to produce vapour. Many tanks have something called a 510 connector, this is the little piece of threading on the peg at the bottom of the tank. It serves to screw your tank onto your battery and is how charge flows from one to the other. The beauty of this is that many brands have the same 510 connector feature so you can swap out different parts of your vape kit - combining a SMOK tank with a Vaporesso mod for example.
Vape Tanks are comprised of a few components; the drip tip, the top cap, the glass cylinder, the base and of course a vape coil. The drip tip is the part you put in your mouth to vape and they come in different sizes depending on whether you’re looking for enhanced flavour or vapour. This is attached to the top cap which is often the part that opens for you to fill the tank with e-liquid. The glass cylinder is what actually holds your vape juice and is situated between the top cap and base. Finally, the base is usually where you’ll find the peg that connects the tank to the battery as well as being the normal spot for your air vents. Inside all of this is the coil to heat your vape juice.
There are three main types of vape tank available. Regular tanks (whether that be a sub ohm or mouth to lung tank), RDAs and RTAs. Sub Ohm and mouth to lung tanks are built to accommodate a coil that you either drop straight in or screw into place. They’re great for people who want a fuss free option looking for a particular coil resistance you can get straight off the shelf. RDAs (rebuildable dripping atomisers) are for more experienced practitioners as you need to build your own coils out of wire or mesh and cotton. Using these requires e-liquid to be dripped directly onto the cotton rather than being absorbed from a tank like a traditional atomiser. RTAs are a similar design in that they require a coil to be made within them, but they also have a tank so you don’t need to constantly top up the wicking material with e-liquid.