Fox Run Brands 4-Ounce Measuring Cup

I purchased two of these, each one intended for a specific purpose. I will be measuring liquids that are not intended for human consumption...i.e., 2 cycle engine oils and hydraulic fluid. (The item description even noted using in the garage for non-food liquids) I tested the measuring marks with a laboratory beaker and found them both to be inaccurate. They measure fairly accurate at the bottom but begin to skew as you go higher up the scale. If you're using these for kitchen and or cooking, I suppose they'd work okay. However, if you require more accurate ratios, these may not be the best to suit your needs. Post note: If I had read the numerous reviews about the accuracy of these I likely would not have purchased them. As such, I have initiated a return of the product as they do not meet my requirements as noted above.