This project is called Fluid Leaves and it was created by a designer from New Zealand called Reinoud van Laar for a tea boutique called ‘Tee & Cupp.’
Inspired by the leaves used to brew tea, leaf patterns are generated to be printed on paper cups. Because the algorithm is random, each paper cup is unique. The designer started with geometric functions, and developed a fluid aesthetic to match the movement of tea leaves in water.
I found this fascinating because it was a physical application of processing to a product for a business, rather than a strictly digital work.