It's a small matter but one that's driving me batty. In my modeling work I usually have anywhere from 2 to 6 little "medicine cups" [the kind they use in hospitals] filled with various liquids -- custom mixed paint, glue, paint thinners, etc -- on the bench and naturally I'm constantly knocking over one or more of these almost every day.
The obvious solution would be to create a small base for them that's tip-proof. Conceptually a 1-3/4" square of something like MDF in which there's been bored a tapered hole that matches the taper of the cups would work fine -- I've already done this with a straight-sided glue bottle that was consistently in danger of tipping because the base was too narrow for the height.
Anyway, I suppose I could drill a straight hole attack it with a rasp. I could also, I guess, use my bandsaw with the table tilted. Both of these seem like brute force and I keep thinking that there has to be a more elegant way. I just measured the slope of the side of the cup and it's ~15 degrees from the vertical so I don't think there are any router bits that would help much either.