There are no earlier models of the Midstream although we have been approached to develop a model that can take the 30 ml and the 10 ml sample bottles/containers. We were asked that as some of the new machines for urine analysis only use a 10 ml bottle, there is spillage and contamination and a difficulty of giving the sample. Furthermore the medical preference is always to have the sample that is tested, tested from the sterile sample bottle in which it was given (called primary collection bottle) and not a test on a sample that has been transferred, which runs the risk not only of increased contamination but also. the risk of patient mix-up of samples.