The Milton Vacuum Flask Duo DLX 1800 is a large-capacity, 1.8-litre water bottle built for people who need reliable hot-and-cold insulation through a full day at the office, gym, school or while travelling. It is constructed from premium SS304 stainless steel inside and out with a copper coating, and its double-wall vacuum insulation keeps beverages hot or cold for up to 24 hours. The leak-proof lid is engineered to prevent spills in transit, keeping your bag dry, and the bottle is ISI certified and tested for durability and corrosion resistance. Backed by a 1-year warranty and drawing on Milton's decades of experience in insulated drinkware, the Duo DLX 1800 is a dependable, everyday companion for anyone who needs a large volume of hot or cold water on hand. The Milton Vacuum Flask Duo DLX 1800 is available at Girdhar Das & Sons, Varanasi.