And I recently boght a set of Plastic Graduaded cilinders from an e-bay seller and ened up throwing them out as they did not seem to give anywhere close to the same volume as my Old Glass Cyclinder that I harvested out of the Garbage at my High School in the 1960's - it was thrown out as the base was broken, but has enough left of the base that it stands well, and the break has not propogated after all these years

The Glass ones I got at the same time as the plastic one did corespond in measure, so they were well worth the extra cost.