South Africa, March 5 -- Rather than relying on surveys or brand claims, the project turned real consumer behaviour into visual evidence, documenting what people actually leave on tables when nights move on.

Godfrey has captured and analysed the half-finished beers left behind in bars across Mzansi using a fly-on-the-wall documentary methodology. Nothing was staged or interfered with.

Godfrey approached the project using a fly-on-the-wall documentary methodology. Nothing was staged or interfered with.

"I treated it like any other documentary assignment," says Godfrey. "You observe, you wait, and eventually patterns start to emerge."

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As the investigation progressed, Godfrey found unexpected allies among waitstaff and bar...