Heisenberg Salts The Berg eJuice by Innevape. This blue slushie flavor is probably one of the top selling vape juices in the world. On the inhale the taste of sugary sweet blue slushie flavor will coat the taste buds. On the exhale, the notes of the blue slushie start to dance away having you running back for more. Therefore, this vape juice is the perfect sugary sweet treat needed to get through the day.