TSA - security theater
at its finest.
"But, there is some good news this holiday season: You can now carry on small snow globes, as long as they are put in those plastic bags along with your other small bottles of liquids.
Snow globes smaller than a tennis ball are now OK to bring onboard a plane, and, by the way, so are pies and fruitcakes. But not jars of jam or jelly or cranberry sauce over 3.4 ounces. They must be put in your checked luggage."
Yes, there is a surprising amount of ambiguity and latitude depending on your point of departure and who is on duty.