Greiner Packaging performs initial tests with K3® cups made from 100% r-PS Press Packagin… September 01 / 2021 Tags plastic packaging food and nonfood sectors packaging solutions yogurt cup Read more about Greiner Packaging performs initial tests with K3® cups made from 100% r-PS The initial trials carried out in Switzerland demonstrate that Greiner Packaging is already capable of producing yogurt cups from 100 percent recycled material. Basically, it’s the most eco-friendly and sustainable solution imaginable.