The 37oz Bistro Thermo Jug utilizes a vacuum to keep hot and cold fluids at their desired temperatures a lot longer. An easy press on the lid opens the jug and lets the fluids flow. The lid closes automatically after each use so that the desired temperature is maintained a lot longer. Whether it’s used for ice tea in the yard, or simply for keeping hot herbal tea on the kitchen table – the Bistro Thermo Jug serves all purposes and looks elegant doing so.