HD/Lowes should have plastic measuring cups in the paint section. They have a coarse graduation. Kitchen stores will have glass ones but then you cannot make any drainage holes. Or look for in scientific supply places but they will be more expensive but have finer graduations.

@tropicofcancer Okay I ordered several of this 2000 ml beaker.

That looks good. Take high resolution close up pictures when doing the experiments. Sometimes it is easier to see when you zoom in on a picture.