A simple solution to big problem
R4-enhanced coffee cups use an inverted volume indicator designed to measure down from the brim. The indicator allows customers to indicate how much room should be left for milk or cream, which eliminates the need to make room.

May I have a large coffee with room for two?
That's all you need to say. The employee knows to stop filling your cup when the coffee level reaches the second line, which leaves room for two ounces of milk or cream.

This simple system has the potential to transform the food and beverage industry by improving the customer experience, increasing yields, and reducing our drain on natural resources. It’s a win-win-win situation; coffee drinkers get a better cup of coffee, retailers stretch the value of the coffee bean, and we all benefit from a more efficient use of fresh water.