Resistant to high and low temps (0°C to +70°C), suitable for industrial dishwashers, microwave ovens and freezers. Can be washed 125 cycles without tarnishing. They keep liquids warm or cool longer than ordinary glasses and preserve beverages without modifying flavor or aroma. Transparent as crystal, polycarbonate dishes are visually similar to ordinary fragile glass. They are recyclable, pollution-free and reusable.Safe for any user. Our polycarbonate products are non-toxic and odorless.