India's Border Security: The Surprising Role of Empty Glass Bottles

• Empty glass bottles are strategically hung on barbed wire fences along India's borders, especially in dense forests, hilly, and inaccessible regions.
• These low-tech bottles serve as an effective alarm system for soldiers, alerting them to intruders or wild animals.
• They are particularly useful in areas where high-tech sensors and cameras are impractical due to lack of electricity, network issues, or extreme weather conditions.
• Unlike expensive electronic systems, glass bottles are cost-effective, require no power, and function reliably 24/7 in any weather.
• When the wire is disturbed, the bottles clink together, producing a loud noise that immediately alerts border security personnel.