If you would like to try and mix your own e-liquids from the comfort of your own home, our DIY feature allows you to make the strength that you want. Some people like their flavours strong and some weak with this feature you can give yourself that choice. We recommend starting out with 20% (2ml of concentrate to every 10ml). There are plenty of free e-liquid calculators on line to help you get started, a quick google search will help you find them.