Cracking the Hard Seltzer Code.
1,200-person taste test delivered for Ipsos
The Challenge
Before hard seltzers landed on UK shelves, Ipsos needed to know which flavours would actually resonate with British consumers. Not a hunch. Not a focus group. Robust, comparable taste data from real people, at real scale, delivered with enough precision that the results could confidently shape a major launch.
They came to Zest to make it happen.
The Audience and Methodology
The target was a large, diverse sample of UK consumers matched not just by age and location, but by drinking habits, preferences, and category experience. People who actually drink in this space and would give meaningful, discriminating feedback on flavour.
A Central Location Test was the only methodology that could deliver the consistency the brief required: every variable controlled, every sip prepared the same way, every session running to the same standard across multiple venues and testing days.
Methodology:
Central Location Test
Respondents:
1,200 UK consumers
Locations:
London & Leeds, with pilot at The White Rooms, St Albans
Services:
Recruitment, CLT delivery, venue management, specialist staffing, product preparation & service, logistics
How Zest Delivered
Before scaling up, Zest ran pilot sessions at The White Rooms, the St Albans facility. Sharpening the respondent flow, testing the service structure, and ironing out any variables before they could matter at scale. By the time London and Leeds went live, the process was tight.
The on-the-day structure was built around restaurant-level precision. Trained hospitality staff were brought in to prep and serve drinks with absolute accuracy, freeing project managers to focus on interviews and respondent flow. The team operated across three distinct roles:
- Kitchen Manager: overseeing temperatures and pour consistency throughout
- Front of House Lead: keeping drinks moving quickly and correctly
- General Manager: managing flow, staffing, timings, and overall quality
Every drink was prepped the same way, in every location, for every tester. That’s what makes comparison meaningful, and what makes results reliable.
Across two large city venues and multiple testing days, 1,200 consumers moved through the experience cleanly and consistently. Products were stored correctly, served precisely, and rotated accurately. Zero drama.
What This Says About Zest
Scale is where operational gaps show up. A process that works for 30 people in one room starts to fray when it’s 1,200 people across three cities over multiple days, unless it was built properly in the first place.
The pilot-first approach isn’t something clients always think to ask for. Zest builds it in anyway, because the cost of getting it wrong at scale is far higher than the cost of getting it right at pilot. That’s not caution. It’s how you protect the integrity of the data.
When the results came back, Ipsos had crystal-clear insight into which flavours had earned a place on UK shelves, backed by robust testing and real consumer feedback delivered without a single session going off-track.
