Controlled handling of liquid-liquid heterogeneous mixtures glass materials that provide separation.
For example, olive oil-water mixture Liquid olive oil with a smaller core mass when placed in a separating funnel is on top, liquid water with a larger core mass forms a phase at the bottom.
Tap opens, bottom the tap is closed by taking it into the liquid collection container. So that the two liquids it gets separated.
Separating and extracting immiscible liquids used in operations.