Maybe a small piece of earplug (like a small flat disc) and small magnet. Use the magnet to magnetize the needle, and the piece of earplug to float the needle for a water compass, bonus, the earplug also can be used as bobber for fishing.
Also, fyi, those alcohol prep pads are VERY likely to spring a leak and dry up if you bend them. In fact, they are likely to dry up even if you DON'T bend them.