The disposable plastic beverage cup is not usually regarded as hazardo
us to young children. Certain varieties of these products, however, ar
e manufactured from a brittle, clear plastic that easily cracks and fr
agments. While most conscientious parents keep their children safe fro
m peanuts, balloons, and other known choking hazards, a child can surr
eptitiously bite a cup edge and aspirate the fragment. We report two c
ases of foreign body aspiration involving clear plastic cups that went
undetected, one of which remained 21 months following a negative rigi
d bronchoscopy. Diagnostic difficulties are related to the transparenc
y and radiolucency of these objects. When suspicious of foreign body a
spiration in children, otolaryngologists should inquire about the avai
lability of clear plastic cups in the household and be mindful of the
diagnostic pitfalls. Further investigations including CT scanning and
repeat bronchoscopy may be helpful in cases of suspected missed foreig
n bodies. An educational campaign aimed at prevention and placement of
product package warning labels should be established.