Assorted Pack Color Changing Cups

5 Pack  Color Changing Cup Size: 16oz or 24oz Product material: Both the lid and the cup use food grade PP, non-toxic and environmentally friendly, please rest assured to use The straw has a fixed ring design, which won't slip out easily The concave and convex design at the bottom of the cup makes the placement more stable Water poured into 15 degrees will automatically change color, when the temperature is low, it will also change color automatically, and poured into warm water will change back to the original color.