F OOD GRADE STEEL: Thermoscope water jugs are free of oxidants for the health of your family. The steel used is food grade and ensures that your food remains safe and chemical & deposit-free. These also ensure that it does not alter the taste of your water. AIR-TIGHT LID: Air-tight lid prevents the food from spilling, the water stays inside and never ends up on our clothes or bag. These enable you to store liquid food to keep it hot and cold. DURABLE FINISH STANDARD: Heavy quality stainless steel material to create a product that brings good shine to the product and helps our product to last for a long.