I don't why u just buy quick fix. its synthetic urine made in a lab to pass a lab test, perfect levels of everything. comes with easy use squirt lid and all. heat in microwave for 12 secs then wrap hand warmer around use rubber band to secure to bottle tape to thigh tada. passed 6 test and 1 DOT test, which Quick fix says it will not pass. Never scared I know the pee is clean that I am giving them it. walk in pee(empty bottle) walk out happy and stil with my job.