Sick of your ice cold water turning room temp in just minutes? Some smart designers from Finland are here to help. They crafted these cups from cooling ceramics, a material which stays cold for up to four hours after a quick water bath. Just dunk the cup for 60 seconds in some cold water and marvel as it keeps its contents cold, even in the open air. As a fun bonus, the black matte exterior acts a chalk board for names, doodles, and labels.