Menthol Crystals – the well known cooling menthol flavor familiar to us all, now available at Nude Nicotine in 10% solution! We solvate 10% menthol crystals in PG for use in your DIY eLiquids for that added menthol kick. While our Minty Menthol flavor concentrate may be a well rounded sweet mint flavor, menthol solution is much more potent and strong in its nature. Use at 0.1-1.0%!