Which organization has developed a portable desalination system to provide drinking water to soldiers deployed in remote areas?

DRDO:
Work: Research & development of defense technologies: missiles, aircraft, tanks, radars, electronic warfare, cyber security, AI, robotics, and more.
Headquarters: DRDO Bhawan, New Delhi, India
Formation: 1 January 1958 (by merging Defence Science Organisation, Technical Development Establishments, and Directorate of Technical Development & Production)
Ministry: Operates under the Ministry of Defence, Government of India
Head/Chairperson : Dr. Samir V. Kamat, Chairman DRDO & Secretary, Department of Defence R&D
Minister Responsible: Rajnath Singh, Defence Minister of India
Employees: ~30,000 (including ~5,000 scientists)
Budget: (2025–26) ₹26,816 crore (~US$3.2 billion)
Motto: “Strength’s Origin is in Science” (बलस्य मूलं विज्ञानम्)