Intergold, the company that designed the Penguins' championship rings, sent along this image displaying the sides of the hardware:
We really like the fact that they included the logos and colors of the Penguins' playoff opponents on the one side. Or at least most of them.
Common sense would dictate that the Capitals' logo was simply too large to place on there.
But we're going to wrecklessly assume the Penguins did that as a show of disrespect to their rivals from the Beltway. And we'll wrecklessly speculate that "OVKN SUX" is inscribed on the inside of each ring. Because making stuff up is fun.