Eppendorf tube
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Eppendorf tubes are small, cylindrical plastic containers with conical bottoms and an integral snap cap. They are used in biochemistry to store and centrifuge small amounts of liquid.
The most common volume is 1.5 mL, but other sizes are often used. In the same way that Kleenex has become synonymous with (and superseded in regular use) facial tissue, so have Eppendorf tubes become synonymous with microfuge tubes or microcentrifuge tubes. Eppendorf is a major manufacturer of this item, but by no means the only one.