Plastic waste from packaging is being repurposed to create new products with similar processing and usage properties as virgin plastics. Understanding its composition, degradation processes, and recycling steps is essential to open up new fields of applications. To shed light on sustainable uses of recycled plastics in packaging, this paper presents interdisciplinary research which investigates and connects three areas to a holistic product view from the material to the end of production. The first area focusses on the exploration of recyclate applications by analysing and processing different recyclates and design-recyclates to identify their potential in plastic packaging products. In the second research area an evaluation model to assess the ecological sustainability of plastic packaging is developed, considering factors like material composition and processing methods. The final area focuses on developing a platform-supported information system for sharing relevant sustainability data, considering mechanisms to enhance data sharing. The challenges and opportunities of using recyclates in packaging are examined through a demonstrator product—a recyclable stand-up pouch which also contains recyclates. The analysis involves production, life cycle assessment, and utilising platforms for data sharing throughout its life cycle. The paper delves into methods to combine the practical analysis of material behaviour, the mechanisms to use and share the resulting material, machine and process data and the sustainability assessment of this data.