Eliminates the use of disposable plastic cups and containers. Small amounts of plant-based material are used to create a flecked finish. No indication of extractable gluten in testing. Double wall construction for insulation of hot or cold liquids. Snap-on, spill-resistant thumb-slide lid with rubber gasket. Due to vacuum insulation technology, capacity is 18 oz. With lid on. Meets FDA requirements. BPA free. Hand wash recommended.