A stasis box was a small device with a control panel which generated a stasis field which would protect perishable items.

The use of stasis boxes were popular with Ferengi because they would often keep live tube-grubs inside them and keep them alive for some time.

In 2372, Sean Hawk discovered a stasis box amongst Linda Addison's quarters aboard the USS Enterprise-E, and found that the box contained a sample of Addison's blood, proving that she had been replaced by a Changeling infiltrator. (TNG eBook: A Sea of Troubles)