The Aspire Premium kit is made of an Aspire CF VV+ battery and a Nautilus Mini. Nautilus Mini: The Nautilus Mini is the next generation of tank systems. Made of stainless steel and Pyrex glass, the Nautilus Mini uses the Aspire Ã’BVCÃ“ (Bottom Vertical Coil) atomizer technology. CF VV+: The Aspire CF VV+ is high-end vaping power system. This battery features stainless steel endpoints, a metal button, and a carbon fiber coated tube. The Aspire CF VV+ battery contains a revolutionary spring connector. This unique technology ensures that there will always be a strong connection between the battery and e-cigarette tank.