What is everyone using for an watertight emergency kit in their boats? I was thinking of making a kit out of an old 32oz Nalgene bottle (pre-Non BPA) like I've seen in the store but with some of the things I'd want if I had to ride out a storm or had an injury. So a mix of first aid and survival gear. Obviously not too much room in the water bottle, but it will be an exercise in packing small critical items. Let me know what you all might have in your kits.