Lost vibrant multi-colored cooler at Lewis and Clark Landing containing drinks, snacks, and personal items.

I lost my vibrant, multi-colored cooler while picnicking at Lewis and Clark Landing last Saturday. It was filled with drinks and snacks, and I realized it was missing after heading back to my car. I would really love to get it back as it holds a lot of memories and had some personal items inside. If anyone has seen it, please let me know!