XStream Synthetic urine is a 3 ounce premixed synthetic urine which is laboratory designed for both male and female usage. Xstream urine contains all the natural ingredients in human urine and is toxin free, balanced for pH, specific gravity, creatinine, uric acid, urea, amino acids, protein, and several other urine characteristics. Unlike other synthetic urine on the market XStream actually smells like urine and foams when shaken.