According to the Latin Vita Prima of St Brigid, a certain peasant was once threatened with execution for dropping and breaking a septiformis calix ‘sevenfold cup’ belonging to the king of Tethba. Fortunately for the peasant, bishop Mel asked Brigid to intervene and her prayer resulted in the restoration of this cup and the freeing of the peasant. Esposito (1935) expressed the hope that ‘Celtic archaeologists’ might ‘throw light’ on the nature of this vessel, but they have not done so yet. For while Mytum (1986) examined the parallel passage in the Bethu Brigte, this provides a far vaguer description of this vessel. Consequently, he assumed that it must refer to a pottery vessel, and concluded that it was ‘most likely’ an example of so-called E-ware. In this paper, I will re-examine this question and suggest that the author of the Vita Prima may have based his description of this vessel on his knowledge of a hexagonal jar or bottle such as were made at Jerusalem during the late 6th and early 7th century as souvenirs for pilgrims.