A Snow Globe is an object that was seen in the episode "New Leaf."
There are two different types of snow globes seen in the episode: those that have a snowman inside and others that have a house inside.
Role in the episode
Plankton sold a bunch of snow globes as part the grand opening of The Chumporium. SpongeBob even bought a snow globe for himself but Mr. Krabs suspected that Plankton is using the snow globes somehow to steal the Krabby Patty Secret Formula. Mr. Krabs then destroys most of the snow globes and an upset Plankton kicks Mr. Krabs out of his store.