NKD Flavor Concentrate 30mL Bottle contains high concentrated flavor. Due to the high flavor concentration NKD Flavor Concentrate 30mL Bottle is intended for flavoring only. We urge you to carefully read and abide by the nicotine safety instructions on the Bottle. NICOTINE IS DANGEROUS in concentrated strengths. Before buying concentrated nicotine, please get in touch with us if you’re uncertain or have any questions.