Glass trick bottle or cup
Translucent deep olive green, appearing opaque black.
Rim folded down, over, and in, forming slight inner lip; broad, uneven mouth; cylindrical neck expanding downwards to join squat bulbous body; bottom deeply push in to form hemispherical concavity. Stands aslant.
Intact; pinprick bubbles; some pitting and iridescence, with one area of dulling where thick enamel-like brown weathering has flaked off.
Essentially a perfume bottle with a deeply pressed in bottom. When inverted it appears as a 'double-walled' cup, hence this type of vessel has previously been described as an 'egg cup.'