Pod Style Vape Kits have really become popular over the last couple of years due to the simplicity they offer, They are Called Pod Kits because unlike a traditional vape tank which is made of glass the kit usually has a plastic pod that is smaller in size and more often than not cheaper to replace than a traditional Vape tank. 
Originally Pod Vape Kits were small with a catridge prefilled with E-liquid, The Problem with prefilled pods is they can be expensive and limited in the amount of E-liquid flavours they offer and it wasnt long before Manufacturers started to release pod kits that you can fill with E-liquid yourself and started to add things like adjustable power and airflow but still offering them as a Small, Compact and lightweight device. 
Pod Vape kits Cater for Mtl ( Mouth to Lung - A restricted draw like a cigarette) and Dtl ( Direct to Lung- Loose open draw for more vapour) and quite often both by changing the type of coil you select. 
Within the Descriptions of the Pod Kits you will find on our Site we will advise you which type of draw the Device caters for and the type of E-liquid we Recommend for it, Although for many of them people do Enjoy using Nic Salts E-liquid.