It is. They're what hold back
the URINE and feces.
The Big Bang Theory Season 8, Episode 18
and he had to drink
URINE for...
Breaking Bad Season 2, Episode 9
passed out in a puddle
of his own URINE.
The Big Bang Theory Season 5, Episode 7
...extracted from the URINE of cows.
The Big Bang Theory Season 4, Episode 22
How much URINE
do these suits hold?
The Big Bang Theory Season 5, Episode 24