Thailand’s monsoon season runs from June to October. During that period, heavy daily downpours keep most shoppers indoors. Lotus’s, Thailand’s leading supermarket chain, and VML Thailand decided that the rain was not a reason to stay home. It was the advertisement.
The Technology
Rain Coupons is built on a straightforward application of waterproof spray technology, applied to pavements outside Lotus’s Go Fresh stores through large-scale stencils. The waterproof coating keeps the stencilled areas dry. The surrounding untreated pavement becomes soaked when it rains. The contrast between the wet and dry surfaces reveals the coupon design in sharp visual relief, creating a large, clearly legible discount offer on the ground that is impossible to miss, even from a distance, and photographable in the rain without any equipment beyond a smartphone.
When conditions are dry, the coupons are invisible. They disappear entirely during clear weather, which also preserves the element of surprise for shoppers who encounter them for the first time during a downpour. The campaign’s creative logic and its technological execution are the same thing: the rain activates the offer.
The Offers
The coupons unlock a rotating selection of rainy season essentials, each one matched specifically to what shoppers might need or want during Thailand’s wettest months. A limited-edition coupon for a completely free raincoat, valued at zero Baht, is available for shoppers caught without one. Discounted laundry detergent addresses the humidity-related laundry demands of the season. Hot beverages at reduced prices serve the post-rain warm-up moment. A 10% storewide discount covers the broader shopping occasion. The selection rotates seasonally, ensuring repeat discovery across the duration of the monsoon.
The product choices are not generic. A free raincoat at a grocery store entrance is relevant to someone standing outside in the rain at that precise moment in a way that no other retail promotion could be. The coupon and the condition for seeing it create the same immediate need.
The Placement Strategy
The campaign extended beyond Lotus’s own store frontages. Coupons were stencilled at bus stops, subway stations, condominium neighbourhoods, and, significantly, near competitor convenience stores. The placement near competitors converts foot traffic that might otherwise enter a rival’s location into a Lotus’s customer who has just found a deal on the pavement outside the competing store. The competitive placement is the campaign’s most commercially aggressive element and the one that requires the most confidence in the offer itself.
The Insight It Was Built On
Most retail campaigns treat bad weather as a threat to footfall. Lotus’s and VML identified it as the specific condition under which their most contextually relevant offer could be seen. The rainy season in Thailand is long, predictable, and annual. It suppresses shopping behaviour in a market where the supermarket chain needs consistent traffic. Rather than advertising around the rain or hoping it would stay away, the campaign made the rain the distribution mechanism.
Lotus’s framed its own campaign intent plainly: during Thailand’s intense rainy season, most people instinctively stay indoors, hide out, or find themselves stuck waiting for the downpour to stop. The Rain Coupons campaign was designed to completely flip that habit, inviting people to grab an umbrella, embrace the rain, and discover what awaits them on the pavement outside the nearest store.
Campaign Name: Rain Coupons
Agency Name: VML Thailand
Brand Name: Lotus’s (Go Fresh)
Location: Thailand (pavements outside Lotus’s Go Fresh stores; bus stops, subway stations, and residential areas nationwide)
