Abstract: A hot and cold water dispenser includes a base unit that has an open top end and a closed bottom end respectively. The base unit is formed from rigid material such that the base unit maintains a fixed shape when a traditional one gallon, square shaped bottle typically sold at supermarkets and other retail outlets (referred throughout the patent application as an “existing one-gallon water bottle”) is positioned therein. A mechanism heats and cools water contained within the base unit, and is housed within the base unit. A mechanism dispenses the heated and cooled water, and is housed within the base unit and directly connected to the heating and cooling mechanism.