The Flavor Cartridge was designed by Liquid Barn with the goal of making DIY eLiquid as user friendly as possible. It included:
60ml Flavor | 30ml Unicorn Bottle | Tastemaker Card
The Tastemaker Card has a guided ruler that matches the unicorn bottle and helps you measure the correct amount of flavor. In the spirit of our goal, however, we've since introduced our DIY eJuice bottle which takes that ruler and places it right were it should be - on the bottle itself!