90ml Unflavored vape juice in a 120ml bottle.
Listed nicotine strengths are AFTER adding 30ml of liquid to the bottle.
Use a Shortfill Cap Removal Tool to easily fill the bottle.
"Do not" add 30ml of water soluble flavor concentrate. That would create a flavored vaping product, which may violate the law in your jurisdiction.
3mg & 6mg are formulated for subohm tanks.
12mg & 24mg are formulated for pods & clearomizers.