Had a run-in with TSA yesterday regarding a snow globe, which clearly had less than 3oz of liquid in it and fit within my quart-sized ziplock. They told me that the rules stated "no snow globes" allowed.

Eventually, they said I could "drain it", and when I asked them to demonstrate, one of the supervisors relented and let me bring it through (with the screener's objections).

Is there really such a rule? Anyone else had snow globe experiences? I tried to do a search, but forum search is down today.