The bladder stores your pee until youâ€™re ready to go! Most bladders hold as much liquid as a can and a half of soda. Drink up! Nerves in the bladder wall tell you when it's time to go. This super-soft bright yellow 6" x 4" urinary bladder plush is perfect for telling someone when urine love, or explaining how to get aboard the potty train. Peep our Big Bladder, while you're at it, he is gigantic! Safe for all ages. Designed in California, made in China.