Valentine’s Day is one of the most competitive periods in the confectionery market. To help Milk Tray stand out, Mondelez wanted to create a memorable gifting experience that went beyond the product itself. By turning every box into a direct, interactive touchpoint, the brand delivered something a crowded shelf rarely offers: a genuinely personalized experience tied to the brand, the product, and the person giving it.
Challenge
Standing out in a crowded seasonal market
Valentine’s Day campaigns compete for attention in an increasingly crowded marketplace. While consumers are looking for meaningful and personal gifts, traditional packaging offers limited opportunities for interaction.
Mondelez wanted to strengthen the emotional connection between the giver and recipient while creating a differentiated brand experience that would drive engagement and encourage consumers to choose Milk Tray over competing products.
The company needed a solution that could seamlessly connect physical packaging with a personalized digital experience while remaining simple and intuitive for consumers to use.
Solution
Turning every package into a personalized digital experience
Amcor, one of the world’s leading packaging companies, partnered with Kezzler to deliver a connected packaging experience through Amcor’s MaXQ digital packaging platform. The campaign launched in 133 UK Tesco stores ahead of Valentine’s Day, with Cadbury Milk Tray boxes each carrying a unique QR code, powered by Kezzler’s unit-level serialization technology.
The experience worked in two simple steps:
- The gift-giver scans the QR code on the pack with their smartphone and records a personal video message for their Valentine.
- The recipient scans the same unique code when they receive the chocolates and plays back the personalized video, which they can then share directly on social media.
See how the Milk Tray campaign connected each physical product with a personal video message through a unique QR code.
Every QR code was unique to that specific box, meaning the message was tied to a single product instance rather than a generic campaign page. That distinction is what made the interaction feel like a genuine brand moment, not a mass-market marketing mechanic.
Following the success of the Milk Tray campaign, Mondelēz extended the same approach to Toblerone for a holiday campaign later that year. Toblerone bars received custom sleeves labeled “To my Mom,” “To my BFF,” and “To Grandma,” each carrying a unique serialized QR code and the same scan-to-record mechanic, activated across 77 Sainsbury stores in the UK.
Results
Creating memorable engagement and brand differentiation
The Milk Tray campaign delivered a 7% increase in sales during the Valentine’s Day period — a meaningful result in a category where marginal gains on key gifting dates translate directly to significant revenue.
Beyond the sales number, the campaign proved something more durable: packaging can be a high-performing brand channel when it’s connected at the item level.
Key outcomes included:
- 7% sales uplift for Cadbury Milk Tray during the Valentine’s Day promotional period
- Earned media coverage across packaging, marketing, and retail trade publications, amplifying reach well beyond the in-store activation
- A replicable campaign model: the same technology and mechanic scaled to Toblerone, proving the approach worked across different brands and occasions within the Mondelēz portfolio
- Social amplification built into the product: recipients could share their personalized video messages directly to social media, extending brand reach organically
- A direct brand touchpoint at the moment of gifting: each interaction was tied to a unique product instance, connecting the brand with individual consumers in a way mass-market packaging cannot
Mondelēz used the same platform, the same mechanic, and the same partner to run it twice. That’s the clearest sign that a personalized brand experience at the product level is worth building into how a brand thinks about seasonal campaigns, not as a one-off stunt but as a repeatable channel.
