1. Those who thought more holes meant salt
2. Those who thought more holes meant pepper
A quick google search didn't turn up a definitive answer. But I have one...
One should have an "s" and the other a "p". Or there should be a window that allows you to peak in and see if the grains are white or brown. (I'm sure my creative teams could come up with a dozen other solutions.)
And that my friends, is the difference between design and user experience.