Swipe your old beverage bottle for this amazing flask by WONDERCHEF. Crafted with the finest material, the flask has the highest stainless steel grade that lasts a lifetime and never rusts. The copper-plated inner wall of the flask leads to better heat retention, which is ideal for keeping boiled water warm for a long time. The vacuum insulation keeps your beverages fresh for a long time. The steel micro-filter helps you to get nutritional and filtered water. The flask is also spill-proof and leak-proof. Use it every day for a consistent hydration routine.