Safety: All materials used for the Origami Bottle are food-safe: both FDA-approved and EU 1935/2004 compliant. The product is FREE from taste, odor, BPA. No glue, toxins, leads. Materials: 1. Main body: made of high-performance premium polymer (TPC, TPE-E, No. 7). - bio-based and cradle to cradle certified. - ultra-durable even on the folding creases. - closed-loop recyclable, i.e. it could be recycled without losing much of its properties in the process. 2. Neck & Cap: made of stainless steel. 3. Isolation gaskets: made of food-grade silicone.