A much earlier post indicated that someone had experimented with distilled
water as liquid for snow globes. Distilled water isn't necessarily sterile;
merely boiled to produced steam, which is distilled and bottled. As this is
generally for steam irons and the like, bacterial contamination is not only
possible, but likely. Should anyone else want to try this experiment, boil the
water, and the prospective container.
Just a thought.