Urine Test Jar This is a conical clear-glass measuring jar with a stem, capable of holding 4 ounces. It features a white glazed scale and numbers. The rim has a V-shaped spout. The scale is marked in "fl oz" (fluid ounces) from zero to four, and in milliliters from 10 to 240. This type of jar was used for the analysis of liquids, such as urine. 1900-1949