Stalcraft Wiki: Berloga-5u Container

In-game description (EXBO)

Like other reinforced containers in the series, it gained great popularity among the military and SSPP military stalkers. According to rumors coming into the Zone from Ch-4 and the Perimeter, military stalkers receive the Berloga-5U for completing a dozen missions!

Quoted from the game's own text in EXBO's public game data. Not written by STALCRAFT Meta.