Screw paying $15 for an "official" Cal hat at the student store. Make your own for free like this guy did.

Materials: Blue/yellow card from the football game card stunts.

Durability: 4/10--It is made of paper.

Practicality: 5/10--Actually smaller than most human heads.

Ease of construction: 8/10--Just fold until it's in a hat shape.

Originality: 7/10--Not just a hole cut in the middle of a card.

Overall rating: 6/10