Safe, food-grade epoxy resin non-leaching, taste neutral protective inner liner independently tested and certified by world-renowned TUVRheinland of Germany and PTS Worldwide.  Safety and quality backed by ISO 9001:2000. Lightweight aluminum; 4.23 ounces Eco-friendly, reusable and completely recyclable after their long life.  Top and cap made of safe, non-leaching polypropylene.  Leak-proof cap, completely removable.  Meets FDA requirements.