A old woman gets a strange looking teapot for xmas.
a week later she notices it has changed shape so tells her daughter who thinks its her medication!
another week goes by and it changes again so the old woman tries to smash it but when she drops it it does not shatter. that evening while she sleeps the teapot turns into a gremlin that attacks the woman in her sleep. Once dead the teapot vanishes and gets a new owner