This is what all the salt shakers looked like in the restaurant I visited last night. I'd heard of the old trick of putting a few grains of rice in a salt
Why Do Restaurants Put Rice in the Salt Shakers? | Taste of Home
Rice Is The Key To Prevent Salt From Clumping - Yahoo Sports
Of rice in salt and Pythagoras in a paddy field - Blog it with Kudums™
Rice in salt shaker to reduce clumping (Florida) : r/mildlyinteresting