Calibrated "to contain" (TC). The scale and figures are durable white enamel, which stand out clearly against the red color-band on these Lifetime Red cylinders. This provides clear, accurate measurements for delivering or containing liquids. A reinforced bead of glass near the top helps to reduce breakage, if the cylinder upsets. The 100mL cylinder is in accordance with ASTM E-133 and E-1272 and is used in ASTM D-86, D-216 and D-447.