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In science, something is considered empty if a space has nothing in it — not even air. This empty space is known as a vacuum. As we simply cannot pour air out of a bottle, we use specialized equipment called vacuum chambers, commonly referred to as just a vacuum, to suck all of the air and other gasses out of a particular space. For example, in our lab, we often use the vacuum chamber to remove air bubbles from viscous liquid polymers such as PDMS for the creation of bioreactors.