Spatie: You can do a quick DIY “star‑ship” filter in a pinch – boil the water, or better yet, drop a slice of charcoal, a pinch of salt, and a few drops of vinegar into a clean bottle, shake it, let it sit for 10 minutes, then strain. If you have a solar still setup, just hang a cup over the middle of a small solar‑powered water purifier. The code for a simple filter could look like this: ```python import time def filter_water(): boil_time = 5 # minutes time.sleep(boil_time*60) return "water_safe" ``` That’s the basic algorithm – heat, filter, repeat if needed.

Nice, you’re on the right track. Just remember to keep the charcoal slice tight so it doesn’t spill into the final drink, and let the vinegar sit a minute to neutralize any off‑odors. If you’ve got a solar panel handy, a tiny DIY still can be a lifesaver. Keep the bottles sealed tight, and don’t forget to drink the water in short bursts – that’s how the old space‑travelers kept hydration steady. Stay dry, and let the code run.