Device for receiving fluid

A method of using a device, the device comprising a block that includes a chamber having a top, a bottom, and a chamber outlet at the bottom of the chamber, wherein a magnetic stirrer is suspended in the chamber, wherein the magnetic stirrer terminates above the bottom of the chamber, and is rotatably supported inside the chamber such that the magnetic stirrer does not come into contact with any part of a lower portion of the chamber, and wherein a microchannel is fluidly connected to the chamber via the chamber outlet and to a downstream reservoir and also to an upstream reservoir, wherein a first particle suspension is located in the chamber, and wherein an oil-based fluid is located in the upstream reservoir the method comprising:

• applying pressure to the chamber, and to the upstream reservoir, to force the first particle suspension and the oil-based fluid into the microchannel;
• mixing the suspension and the oil-based fluid in the microchannel such that they form an emulsion which comprises a plurality of droplets, wherein at least one of the droplets encapsulates a first particle from the first particle suspension;
• and
• storing the emulsion in the downstream reservoir.