The document discusses the contents of a product called "Pop Neve" which is a white powder contained in a packet. [1] When water is added to the powder, it expands and gets cold. [2] Through experimentation and research, the author determines that the powder contains sodium polyacrylate, which causes it to expand when water is added, mimicking the effect of "fake snow". [3] They conclude that sodium polyacrylate was the key ingredient in Pop Neve responsible for its unusual property of expanding when water is added.