Aspire Nautilus 2S Tank 2.6ml. Aspire brings you the all new, just as curvy, Nautilus 2S. The new Nautilus 2S tank comes in 2.6ml. The latest in the Nautilus 2 tank series, a sleek, curvy design equipped with a pre-installed 0.4ohm BVC coil for direct to lung vaping and a 1.8ohm BVC coilfor mouth to lung vaping