10ml bottles of e-liquid are what the majority of vapers use. They′re pre-mixed with nicotine and available in every VG/PG ratio, flavour and nicotine strength you can think of. Also known as TPD e-liquid, 10ml juices are tested and meet the requirements of the Tobacco Product Directive. The TPD applies certain limits on e-liquid, namely, any e-liquid containing nicotine can not be sold in bottles larger than 10ml and in strengths no higher than 20mg/ml.