The Smok TFV8 Baby features the same top filling method that everyone has grown to love. The TFV4 had it, as did the micro and nano versions. This same top filling style was continued with the V8, and now with the Baby version. The top portion of the tank swings open and allows you to easily fill up your tank with e-liquid. You don’t have the twist the top off of this tank, you can just pop the swivel to the side and fill up your tank.