Flask is a pot where we can keep water hot. It is just as crucial as refrigerators. It has become a part & parcel of our daily life both in & outside of our household. It enables us to enjoy a hot water long after being boiled. It is an airtight pot that keeps the water warm by keeping the heat preserved in it using heat insulator all around the box. Besides keeping the water warm & fresh for a more extended period, it increases the overall efficiency of our life. Water doesn’t have to be heated again & again before using, thus saving energy & fuel. By doing that it also saves time & releases us from going through some extra work.