• Includes HydroLink™ Modular Connection System with positive shut-off HydroLock™ • Exterior fillport enables easy filling on-the-go • Closed cell insulation and neoprene tube cover keeps water cool or warm for hours • Integrated MOLLE/PAL attachment system • Use D-ring attachment points to place unit anywhere • Bite Valve Cover keeps Big Bite™ Valve • NSN 8465-01-396-9921 Colors: Black