ORIGINAL Quick Fix Synthetic Urine is 2 ounces of the best synthetic urine on the market to day!. It is premixed, so it is easy to use. As with all of Quick Fix’s synthetic urine products, this product is premixed with urea and almost indistinguishable from the real thing. This product is unisex – can be used by both men and women. Quick Fix products are formulated to resemble the real thing – so you always have that ‘real feel’.