Holy water bottles (ampullae) made of lead were brought from places of pilgrimage as souvenirs.
Mitchiner suggests that many ampullae were used in the annual springtime ’Blessing the Fields’ ceremony, in which the Holy Water they contained was sprinkled on the ground to give prayer for a good harvest. Having served this purpose, Mitchiner suggests that the ampullae were discarded. Others have suggested that the ampullae were buried along with their contents for a similar purpose.
Medieval lead pilgrims ampullae with flower pattern. East Anglia type many made at Walsingham