Yeap, that works.... Although I prefer the plastic container, may be one of those used to keep food leftovers, they are strong and water tight, I don't know the name in English, being rigid helps to keep stuff safe and organized, can also be used as water or food container....
Some items: Waterproof matches, poncho for rain, shelter and water collection, signal mirror, insect repellent, candy bars... hooks and fishing line , 10 m of thin and strong nylon rope, big knife, multi tool, spf lotion, dental floss and needles for repairs and build traps (strong), 5 meters of duct tape rolled in a lighter, space blanket (great for shelter and being seen) head light, small compass, wire, hat, few safety pins.... All these should feet in a 25x10 cm plastic container....