Are you trying to decide which drug test cup would serve you best but there are just too many options? Well four panel cup drug tests are definitely more affordable but you need to be sure of your suspicions. The most important thing is to know your area and find out what drugs are in fashion, what drugs are grown or manufactured in your geographical location. The reason why we in the industry, describe a four drug cup as "four panel" is simply because the cup has four strips called panels (each one tests for a specific drug) and when the panel or panels make contact with the urine specimen a test result occurs with in minutes. Our 4 Panel drug test cup is an immunoassay based on the principle of competitive binding. The E-Z Key Cup, Noble Medical Cup and iCup Drug Screen 4 Panel cup is a lateral flow chromatographic immunoassay for the qualitative detection of multiple drugs and drug metabolites in urine. Most Drug Test Cup combination start at three panel and can go to 10 panel or as high as a 13-15 panel drug test cup. A 13 panel test cup can detect up to 13 individual drugs! As more drugs are created thus there will be a need for higher panel test options. Our four panel cups allow you to test for (COC, THC, OPI, mAMP) or (COC mAMP THC MOP).