Plastic Graduated Beaker Set, 5-Pack

Measurements inaccurate!

It has just come to my attention (after several confusing issues) that these beakers are not accurate. I have now tested the measurements using several methods and none of them are correct and actually each of the smallest 3 show different measurements. For example, 30 mls shows up as 35 mls in the smallest, 38 mls in the next size up and 47 in the next size up. This has caused several issues with my business.