Columbus Cupholder
While having sex with a pregnant woman, the act of repeatedly driving your penis in so deep and with such great force that you actually create an indentation in the fetus' partially solidified cranium. When the child is born the depressed portion of the skull will provide you with a perfect place to set a can of your favorite beverage.
Dude. I hate that I have to wait another 3 months for Jill to pop that kid out. I'm getting god damn sick and tired of holding my own beer. My little Columbus Cupholder can not get here soon enough!