The clues point to the location of the ancient Indian port city of Muziris. Researchers now believe the ancient port may have been near the small, modern-day town of Pattanam.
The port was likely the point for transfer of spices, particularly black pepper, from India in exchange for wine, oils, glass, and jewelry from Rome.

Amphoras, a term that I am embarrassed to not have been familiar with prior to reading the BBC story, were two-handled pottery vessels used by the ancient Greeks and Romans to transport wine and oils.
Source: BBC
Photo: Example - Late Greek amphora (public domain)