If you long for a clean tasting sensation while still retaining the nicotine then Krystal is the ultimate choice. Krystal has a nicotine rating of 36mg, which enables you to dilute it and obtain up to six times the quantity while choosing your own strength of liquid. One 20ml bottle of Krystal plus one 20ml bottle of ECOmix will give you 40ml of 18mg nicotine strength liquid.