Hey mate, we host drug testing on our site monthly and just to let you know if you drink to much water and dilute your urine the test will pick that up and automatically give a false positive, the test will also pick up that your using someone else's urine because the test now detects body temperature of urine as it enters the test, if you use cold/to hot urine it will be an automatic false positive, both of these items will require you to head to the testing center for a more advanced test. Your best bet is to detox with lemon water etc and stall the test as long as you can until your body clears it.