Quote from Phoebe in The One with the Holiday Armadillo
Chandler: Pheebs? Skull? Phoebe: Oh, yeah, it's my mom's. Rachel: Oh, my God! Phoebe: No, no, no. It's not my mom. It belonged to my mom. Yeah, she used to put it out every Christmas to remind us that even though it's Christmas, people still die. And you can put candy in it.