Medkit (Risk of Rain 2)

Not to be confused with the first game's version, the Medkit. The MedKit is a returning unlockable common item Risk of Rain 2. After taking damage, the Medkit activates in 1.1 seconds to heal 10hp per stack.

To unlock Medkit, simply kill one elite enemy. They can be easily distinguished by their coloration and the icons above their health bars.