India, April 23 -- If your daily hit of fizz has been replaced by an "out of stock" alert, you are not alone. In parts of Delhi, Mumbai, Bengaluru and Ahmedabad, the iconic silver can is making itself scarce, triggering chatter on Reddit, X, and Instagram. For many young consumers, Diet Coke is more than a drink. It's a habit, a trend (remember fridge cigarettes?), and even a personality marker. The shortage has sparked memes and mild panic online, with users sharing screenshots of empty quick-commerce listings and asking, "How will we survive summer without the fizz?" The issue isn't the beverage but its packaging. Aluminium prices have surged 14-20% in recent weeks, touching four-year highs of about $3,672 (approx Rs.3.45 lakh) per tonne amid geopolitical disruptions and supply constraints. India's can production is currently operating nearly 20% below demand. Add to this logistical delays linked toUS-Iran war tensions and stricter BIS (Bureau of Indian Standards) certification norms for imports, supply has now tightened further. On its global FAQ page, Coca-Cola notes, "An increased demand for products consumed at home and shortages of aluminium and certain ingredients have impacted our supply chain in some places."...