What’s old is new Add a retro touch to your next game of beer pong by using these REDDS Yellow Hyper Colour Cups instead of the classic red! This pack includes 8 cups that change from yellow to green when filled with cold liquid. Please note that the liquid must be cold for the colour change to work so make sure that drinks are served straight out of an esky or with ice. Perfect for Australia Day! Item Includes: 8 x Cups. Fit and Sizing: Cups can hold 425ml / 14oz of liquid.