PPWR is changing how packaging buyers evaluate materials, structures, documentation, and future compliance requirements. In this guide, I explain what buyers should ask packaging suppliers before approving new projects or reorders. I cover material specifications, packaging BOMs, laminations, window films, inserts, recyclability, food-contact considerations, supplier documentation, and structural optimization. I also explain why buyers should review packaging step by step instead of redesigning everything at once, using sampling and performance testing to reduce sourcing and production risks.