Firstly, there are 2 different categories of juices, which are Freebase and Salt Nic. Each type has different size bottles, for example, the freebase liquid is varied from 50ml and 60 ml bottles. In the other hand, the Salt Nic uses the bottles of 10 ml (Malaysia) and for the oversea market using 30ml bottles. In the other hand, in terms of nicotine level, there is a range of 0mg, 3mg, 6mg, 9mg, 12mg. For the Salt Nic, it’s has 3 different range of nicotine level which are, 0mg, 35mg, 50mg. So, it is easy for you to control your nicotine intake base on how strong you want it to be. Moreover, the Fcukin’ Flava Adv Series flavor contain of 2 type of menthol level, which are “Regular” and “Low Menthol”. So, for those vapers who prefers to have a hint of cooling effect then they can choose wisely depend on their taste.