Thank you very much for your interest in our alcohol test product. My name is Guohong Wang with Ph.D in organic chemistry and over 20 years experience in both organic and immunoassay chemistry. Currently, I am the VP of R&D of Immunalysis Corp (*****) in USA and have developed and marketed over 20 new products. We can offer you the best saliva alcohol strip testing in the world with price range at $0.4-$0.8/per strip, depending on the amount of tests per order: $0.85 (1-1000), $0.65(1000-5000), $0.50(5000-50, 000), $0.45(>50, 000). Based on the field testing results, the performance of our product is much better than that of commercially available products. SEO saliva alcohol strip is the only product that shows distinct color difference among 0, 0.02% and 0.08%. If you find any alcohol strip testing product that peforms better than ours, I will send you 1000 strips at no charge. You can visit ***** to learn more about our products. By the way, we are also selling the rapid drug testing products including Heroin specific rapid testing with less than 0.1% cross reactivity toward codein. All our products were made in USA and packaged in China in order to cut the cost for our customers. You can contact me any time if you have any questions about our products.