The Iran war’s most unexpected casualties have arrived not as geopolitical communiques or oil price briefings, but as empty supermarket shelves and monochrome snack packets. Across two of Asia’s most consumer-alert economies, the downstream consequences of a conflict thousands of kilometres away are making themselves felt in the most mundane and, for many, personally confronting ways.
The can that cannot
In India, Diet Coke has effectively vanished. Since mid-April 2026, the silver can has gone missing from Blinkit, Zepto, Swiggy Instamart, supermarket refrigerators and kirana shelves alike across Mumbai, Bengaluru, Ahmedabad, Gurugram and Pune. Blinkit moved to cap purchases at four cans per customer. Distributors have reported that Coca-Cola began rationing supply or declining to fulfil certain orders. The company has not issued a public statement, but the constraint is real and industrywide.
The proximate cause is aluminium. The Gulf accounts for roughly 9 per cent of global aluminium production, and Iran’s closure of the Strait of Hormuz from late February has trapped that supply in a geopolitical standoff. The situation worsened dramatically on March 28, when Iranian missiles and drones struck two of the Gulf’s largest smelting facilities, the Al Taweelah complex of Emirates Global Aluminium and Aluminium Bahrain’s main production site, destroying an estimated 1.6 million tonnes of annual smelting capacity overnight. London Metal Exchange aluminium prices surged sharply in response.
Unpacking a packaging decision
Why Diet Coke specifically? The answer lies in a packaging decision made years ago in a boardroom. In India, Diet Coke is sold exclusively in aluminium cans. Regular Coca-Cola, Thums Up, Sprite and most other soft drinks are available in PET bottles and glass formats as well. When aluminium supply breaks down, those brands lose some volume. Diet Coke just disappears.
The irony is compounding: India’s low-sugar beverage segment had been on a steep growth curve, with Diet Coke sales doubling year-on-year before the shortage hit. Zero-sugar drinks now account for roughly 30 per cent of Coca-Cola India’s volumes, and market projections put the broader segment at $4.7 billion by 2030. The shortage arrived precisely as the category was scaling at breakneck speed.
A second pressure layer was already in place before the Gulf crisis. India’s Bureau of Indian Standards had introduced quality control requirements for aluminium products in May 2025, mandating BIS certification for a wide range of aluminium inputs. Large manufacturers faced an October 2026 compliance deadline, smaller ones into 2027. Domestic can producers were already at or near capacity trying to absorb the certification transition. When the Gulf supply shock hit, it landed on a domestic manufacturing base that had no slack left to absorb it. New production lines from manufacturers like Ball Beverage and Canpack require 10 to 12 months to come online. Full normalisation, analysts say, is a 2027 story at best.
All the company could do by way of response was to go old-school; soon after it became apparent that aluminium shortages would hit the brand hard, the decision was made to pivot to glass bottles for diet coke. Classic, and charming no doubt, the bottles started popping up on popular retailers listings. But there is, as always, a catch; these 200 ml glass bottles were priced at an eye-watering Rs. 100 a bottle, or about 3x the market price. The price, as you might image, is more than a bit difficult to swallow.
Japan hit by ink shortages
The phenomenon is not confined to India. In Japan, the same Strait of Hormuz closure is draining colour from supermarket shelves, though the mechanism is different. Printing inks rely on petrochemical feedstocks including solvents and resins derived from naphtha, an oil by-product that is also essential for plastics and synthetic rubber.
Japan, which is almost entirely import-dependent for its oil, has found naphtha supplies tightening as Hormuz shipping constraints bite. Tokyo-based Calbee, one of Japan’s most recognised snack brands, announced that from May 25, 2026, it will switch 14 of its products to black-and-white packaging, limiting ink use to two colours. The company’s iconic bright-orange Usu Shio potato chip bag, featuring a cheerful potato-man mascot, will give way to stark monochrome lettering. Calbee described the measure as necessary to ‘maintain a stable supply of products’ and to ‘respond flexibly to changing geopolitical conditions.’
Food for thought
What connects the empty Indian Diet Coke shelf and the grey Japanese crisp packet is a single chokepoint: one strait, one conflict, one cascading series of decisions made decades ago about where to source materials and how to package products. The 2026 Iran war is not only a geopolitical event. It is a supply chain stress test playing out in real time, and it is revealing how deeply integrated, and how unexpectedly fragile, the material infrastructure of everyday consumer life has become.
The can will return. The colour will come back. But the lesson that a missile strike on a Gulf smelter can empty your fridge and bleach your snack aisle is not one the industry will file away easily.
