> You can take a cup, calibrated like that, and then set it in another clear
> cup (or, failing that, shine a high-intensity light into the inner cup).
> Obviously, since the cup top/bottom has some vertical height, you can't
> nest them perfectly together; there is some (1/8"-1/4") of
> "stack height". Mark the second cup with the calibrations of the
> first cup. Cut a slot in the 2nd cup, right next to the markings, and you
> now have a "master cup" suitable for marking any number of
> similar cups.

> I didn't originate this idea, but I'll vouch for it! I can't remember
> whose idea it originally was...Don B? Brian C? Somebody take credit!!
> Pleeaase!!

on the master cup instead of cutting a slot, drill or punch a small hole right on each measuring line of the inner cup. Then put the next cup into the holed master, put the nib of the marker thru the hole and spin the inner cup to get lines all around.

-mick