Boss can be prepared in two ways according to your needs, it can be Vaped Individually, or as a classic 40 ml Mix & Vape, simply by combining the two bottles.
To make the 40 ml Mix Liquid, and obtain a 60 ml Mix final Liquid, all you have to do is pour the two bottles into the included 60 ml bottle and finally add 2 Nicotine Bases 10 ml as desired.
To make a 30 ml Mix Liquid, on the other hand, all you have to do is pour into the single bottle, 1 10 ml Nicotine Base of your choice.
2x Liquids 20 in 30 ml
1x 60ml bottle