This coffee maker design has two bulbs stacked on top of one another and are connected by a stem. A wide hole on top of the top bulb feeds into a smaller opening on the lower second bulb through a stem. The top bulb is filled with coffee grinds, while the lower bulb is filled with water. The stem of the vacuum pot features a seal that creates a vacuum within the lower bulb that holds the water, hence the name. A filter is put at the bottom of the top bulb. This filter allows water to ascend through it, followed by the brewed coffee being released back into the bottom bulb.