The original system was set up for 10ml bottles E-Juice and only provided for 4 nicotine strengths. In 2014 this system was expanded to work on 15ml, 20ml, and 30ml bottles of E-Juice and Drip Juice. This system also expanded from the original 4 nicotine strengths to cover a larger variety of strengths. Drip Juice was ever expanding with a new brand developing almost twice per day. (continue reading) The chain store once more asked for help and got it with the expansion of the nicotine system.