Pods and tanks are essentially the same thing in that they both hold e-liquid and heat it into vapour. There are, however, some differences between the two. Tanks are often interchangeable as they use a 510 thread, allowing them to be paired with lots of different vape devices. Pods on the other hand are generally created for specific kits. As well, a tank is very long-lasting but pods are usually either single use or have a limited lifespan. Finally, pod kits are designed to be small, simple and discreet, whereas tank kits tend to be much larger with more features to learn and understand.