The Maha Kumbh Mela 2025, the world’s largest religious gathering that concluded this week, was also a battleground for brands looking to capture attention in a sea of millions. With over 150 million attendees estimated, companies seized the opportunity to integrate their messages seamlessly into the festival experience.

From digital payment companies that set up seamless transaction points to FMCG giants offering free product samples, the Kumbh Mela evolved into a marketing spectacle. For instance, telecom brands were providing free Wi-Fi zones, while navigation apps were using AI-powered tools to help pilgrims find their way through the vast congregation. Beverage companies handed out free hydration stations, while automobile brands offered shuttle services to ensure smooth transportation within the mela grounds. With such an enormous audience, brands were not just advertising – they were embedding themselves into the very experience of the pilgrimage. The scale and creativity of brand involvement at Kumbh Mela 2025 showcased how marketing is evolving into an experiential and service-oriented model, making engagement more meaningful than ever before.

However, one of the most memorable and impactful brand activations in Kumbh Mela history remains Lifebuoy’s Roti Reminder campaign from 2013.

Lifebuoy’s Roti Reminder Campaign: Confluence of Behavioural Economics, Marketing, Habit Formation and CSR
At the 2013 Kumbh Mela, Hindustan Unilever’s Lifebuoy had launched an innovative public health campaign, which instead of relying on traditional advertisements, found a simple yet ingenious way to spread its message – through food.

By stamping freshly made rotis with the message, “Did you wash your hands with Lifebuoy?”(in Hindi), the brand subtly but powerfully encouraged millions to adopt better hygiene habits at mealtime. Over 2.5 million rotis, served in over 100 kitchens, carried this gentle reminder, all at a festival attended by more than 100 million people. The campaign’s impact was nothing short of extraordinary: a 4% rise in brand recall, a three-year high in market share, and an astonishing return on investment of 1,600 times!

Why do we continue to reference a campaign from 2013? Because beyond its marketing success, the Roti Reminder campaign can serve as important lessons for brands seeking to establish their value among the devotees.

A Masterclass in Behavioural Economics
The campaign is a textbook example of Nudge Theory, pioneered by Nobel laureate Richard Thaler. Instead of coercion, Lifebuoy introduced a subtle, visual nudge – embedding its message on the very food people were about to eat. This prompted immediate action without restricting choice, making handwashing feel like a natural and necessary step before meals. By integrating the nudge into an already established habit – eating – the Roti Reminder minimized cognitive effort and seamlessly encouraged a shift toward better hygiene practices.

Habit Formation and Consumer Behaviour
Psychologists argue that habits are built on cues, actions, and rewards. The Roti Reminder leveraged this formula: the message on the bread acted as a cue; washing hands was the action; and the feeling of cleanliness and health was the reward. By embedding this practice in an everyday ritual, Lifebuoy not only reinforced its brand but also encouraged long-term behavioural change in hygiene practices.

Guerrilla Marketing with a Purpose
Lifebuoy’s approach was low-cost, high-impact guerrilla marketing at its finest. Traditional advertising – hoardings, television spots, or digital campaigns – may have been lost in the sea of messages at the Kumbh Mela. Instead, the brand used an unexpected and deeply relevant medium: food itself.

Corporate Social Responsibility and Brand Loyalty
Beyond its commercial success, the campaign was also part of Unilever’s broader Sustainable Living Plan, which aims to improve hygiene for over a billion people worldwide. At a time when companies are expected to play a larger role in social change, the Roti Reminder campaign proved that purpose-driven marketing can be both impactful and profitable.

The Legacy and Modern Marketing Parallels
More than a decade later, the Maha Kumbh Mela 2025 witnessed another wave of ambitious marketing campaigns from leading brands, and the essence of marketing remained the same: meeting consumers where they are, in the most meaningful and relevant way. For instance, Lifebuoy’s campaign allowed the brand to cut through advertising clutter while aligning itself with a public health cause, reinforcing both brand purpose and trust.

Today’s brands can learn that meaningful impact often comes from simplicity and relevance rather than flashy, high-budget campaigns. Hence, in an era of digital overload and advertising fatigue, the Lifebuoy Roti Reminder stands as a shining example of how the confluence of ingenuity, purpose and economic as well as marketing principles can create a lasting impact. Therefore, despite the Roti Reminder being completely offline, it achieved a deeper level of connection. It didn’t just promote a brand; it changed behaviour at scale.

Dr. Payal Seth is an Associate Fellow at Pahlé India Foundation.