These Pyrex® VISTA™ graduated cylinders are calibrated "to contain" (TC). The cylinder consists in two parts: a strong, accurate glass graduate, and a detachable, sturdy plastic base which absorbs impacts and reduces breakage. The graduate can be conveniently stacked by removing the base. Volume 10, 25, 50, and 100 mL are available. The 10 mL has a funnel top for careful pouring. Tolerances are +/- 5% of total at any point.