Designed to be used with Large ELiquid solutions, to add nicotine strength to them.
Simply Pour the contents of this bottle into large 0mg ELiquid bottles to mix them.
How to work out the Nicotine Strength of your liquid when you combine it
Firstly, This is relatively simple sum, but a calculator will help.
To work out how strong your juice will be after mixing, you divide:
Total Nicotine content by Total ML
So how do you get those numbers? There's a step by step below to help!

First, Get the total ML (millileter) amount of all the liquid used.

So for example if you buy 1x 50ml bottle of flavour, and 1 x 10ml nicotine shot, that's 60ml total.

Next, Get the total MG of nicotine used.

For example, if you had 1x Nicotine shot, and it was 18mg nicotine strength, it's 1 x 18, or 18mg total.

If you had 2 x Nicotine shot, and they were 18mg each nicotine strength, it's 2 x 18, or 36mg total.
Divide the Total MG by Total ML to get the nicotine strength of the solution. Divide in that order. MG / ML, not ML / MG
Read below for some example equations.
Equation example 1:

You have a flavour bottle that's 80ml, and You have 2 x 10ml nicotine shots that are 18mg each.

Total ML = 100ml (because it's 80ml for the flavours, + 20ml for the 2 shots)

Total MG = 36mg (because it's 2 shots at 18mg each, so 2 x 18)

Divide the Total MG against the Total ML, you get the strength

36 / 100 = 0.36

The Nicotine strength would be 0.36% (or 3.6mg)
Equation example 2:

You have a flavour bottle that's 100ml, and You have 3 x 10ml nicotine shots that are 18mg each.

Total ML = 130ml (because it's 100ml for the flavours, + 30ml for the 3 shots)

Total MG = 54mg (because it's 3 shots at 18mg each, so 3 x 18)

Divide the Total MG against the Total ML, you get the strength

54 / 130 = 0.415

The Nicotine strength would be 0.415% (or 4.15 mg)
Equation example 3:

You have a flavour bottle that's 50ml, and You have 1 x 10ml nicotine shot that's 18mg.

Total ML = 60ml (because it's 50ml for the flavours, + 10ml for the 1 shot)

Total MG = 18 (because it's 1 shots at 18mg each, so 1 x 18)

Divide the Total MG against the Total ML, you get the strength

18 / 60 = 0.3

The Nicotine strength would be 0.3% (or 3 mg)