When you've got to go, you've got to go -- why not take your bladder along for the ride? Our bladder is just happy urine its thoughts. How about a great gift for your fabulous urologist, huh? The bladder stores your pee until you're ready to go! Most bladders hold approximately 300-400 milliliters of liquid, about the size of a can and a half of soda. Drink up! When you pee, your brain tells the muscles in your bladder to tighten and squeeze out the urine. This cute little 1.25" printed aluminum pin comes packed on a card and was made in China. I Heart Guts happy organs put a smile on your face and smarts in your brain! Our adorable organs make the perfect gift for everything from a broken heart to a tummy ache. Get your feet wet in anatomy or bone up on your physiology with our nerdy plush toys! I Heart Guts is the brainchild of an anatomically obsessed illustrator who loves internal organs and all they do. Founded in 2005, our bare-bones family operation strives to offer plush organs with love, style and geeky puns. I Heart Guts plush organs were named Best of Toy Fair by Popular Science magazine in 2014.