This article is about the train car. Did you mean the episode?
The Snow Car is the first car Tulip Olsen encountered on the Infinity Train, waking up there after boarding. Due to its similarity to the snowy landscape she had been walking through prior to entering the train, she initially assumed the train's appearance had been a dream. She encountered One-One there, before finding the exit door at the giant snowman and going out to realize that she was, in fact, still on the train.
The Snow Car is a train car filled with snow and dotted with pine trees. It seems as though it never stops snowing here. The car is also filled with various types of snowmen, with the door to the next car being inside of a giant snowman.