I'd fill it with:

• The Fred Meyer notes written on AP Calculus flashcards
• Cigarettes that I'll never smoke... possession is more rebellious in feeling.
• Past Photography pictures of various flora & fauna
• Fred Meyer receipts with my various doodles
• Bobby pins!
• Hemp string for jewelry
• Paper cranes, dragonflies, fish, bees, and throwing stars.
• Running gloves
• The rings that I find; if I find rings on the ground, Fred Meyer, school... I keep them. Some don't fit... but they're nice to have.
• Totokaelo snapshots. There's this website called Totokaelo with an overwhelming amount of fashion ideas; so I print various favorites and take them with me to thrift stores and the mall to mimic the outlandishly expensive selection available. I don't throw them away, I keep them too.
• The parts to a recorder
• Drawing pens. None of these Crayola pens.. authentic drawing pens running at $300 for the entire spectrum of color.
• Postcards from Anne when she goes backpacking in Europe
• Letters from two important people...
• Buttons
• Plant and crop seeds: Like corn, zucchini, peas, beans, snake plants... You know, so I can survive
• Self-made maps to treasure.. G-HArrr
• Dido CDs...
• Crayons of the melted variety..
• Confetti and Chupachu's!! That way, I can hold my own fiesta whenever I feel it necessary