Lead ampulla that has a circular hollow chamber and long rectangular neck; flanking the neck are double looped handles consisting of a small loop surmounting a larger. Emanating from the base of the handles is a circular flat band that in inscribed on both sides and has a rectangular cross-section.  The band surrounds the main chamber and is attached to the body at five points, the base of each handle and three small arms, one at the base and one on each side, the sections between each of the anchoring points remains open.

On one side is depicted St James. He is depicted wearing calf length robes which are draped over his right arm that is raised in blessing. In his left hand he holds a pilgrim staff the has a scallop shell suspended from the top. Suspended at hip height from a shoulder strap that crosses diagonally across the body is a bag or flask. The head is bearded and surrounded by a halo. To the left of the figure is a large hand and presumably pays reference to the hand of St James that was held at Reading Abbey. On this side the inscription on the external band reads + IMAGO . SCI . IACOBI . APLI . DE . RADINGIIS +

On the opposite side is depicted St Philip, here the saint is shown in calf length robes which are again draped over a raised left arm, this time holding a staff that is surmounted by a cross. His right arm is held out to the side and holds and unfurled scroll the reached to the ground.  It is unclear if the head is bearded or not but it is surrounded by a halo. To the right of the saint is the is the head and shoulders of St Philip viewed in profile and shown as a beardless young adult which alludes to the skull of St Philip that was held at the abbey. On this side the inscription on the external band reads + IMAGO . SCI . PHILIPPI . APLI . DE . RADINGIIS +