The listing, Curves Cooler Cup for Protein Shakes has ended.
Easy as measure, turn, shake and pour. Bottom half of cup is the cooler portion by putting in the freezer. Once frozen cup is ready for travel. Measure milk in the frozen bottom and measure out protein shake mix and keep in top portion. Make sure vents are closed in top half. When ready to use turn top to open vents and mix falls in milk, shake and drink. Bottom cup also has measurements labeled on the cup for added convenience.