Box using alcohol inks

Although the colors aren't the truest, I just had to share what I made this week. Awhile back, my friend Theresa gave me three metal boxes. This one started out silver. I added blue, red, and green Pinata inks to the entire outside. It will be a good thing to take on my trip.
Can you guess what will go in it? What would you use it for?
Stay tuned and I'll let you know in less than a week when I head for California.