Lock & Lock Sauce Bottle is an air, moisture and liquid tight container that keeps your sauces fresh for longer Made of durable and heat resistant, US FDA and German SGS approved material and will last you a lifetime Comes with a silicone seal and locking tab system that keeps its contents free from contamination by the elements Easy to open and close and can are designed to last over 3 million operations Boasts a stackable design for easy and space-saving storage Microwave, dishwasher and freezer safe Unlock all latches and loosen the lid before heating in a microwave, avoid overheating food that is high in oil, sugar, tomato and fat to keep the box from staining Silicone seal can be removed for cleaning