I saw this thread in the General Discussion forum, but I feel it should be in the DIY section because it benefits the DIYers the most. This isnt my listing, Im not selling these, but just thought it would be a god tool for DIYers.
e-Cigarette e-Juice Nicotine Test Kit Bromothymol .12N | eBay
e-Cigarette e-Juice Nicotine Test Kit Bromothymol .12N | eBay