Wow! Antique-shop.com forums are in the big #1 spot on Google for the search term "antique shop forum", for 4 years running!Thanks to YOU.
I "2nd" that "whoa" by KC, ..... those are not shakers. Me thinks sometimes "holes" are put into ceramic pieces if they are to be "fired". Like "dishwasher safe" or "oven proof", .....its "kiln proof". .,HA, punching holes in top = "pie proofing".