Heisenberg The Berg eJuice by Innevape. A one of a kind blue slushie flavor known all across the world. On the inhale distinct notes of the tart blue raspberry will leave the lips puckered. On the exhale the sweet notes of blue raspberry slushie come through. As a result Heisenberg eJuice is known all across the vaping world as one of the best selling flavors. It’s consistently the top seller in almost every vape store that carries it.