There is no occasion that can't be improved with pizza, including Christmas. Crowd around your tree, grab a slice and shake on that Parmesan cheese like it's a dang snowstorm. Now THAT'S what we call a Merry Crustmas. Get festive and digestive with a pair of pizza Christmas socks covered in cheesy trees with pepperoni ornaments and sparkly gold stars. They also have open pizza boxes with the message "Merry Crustmas."