You can drink too much water. Extra fluid mostly gets flushed, and in long hard efforts too much plain water can dilute sodium. Match intake to heat and activity, not a gallon contest.
Chugging a full bottle at once doesn't hydrate you better than steady sips. Your kidneys clear a big dump pretty fast. For desk days, smaller amounts across the morning beat one heroic refill.
Plain water covers most everyday sweat loss. You mainly need electrolytes after long, hard sessions or heavy sweating in heat, not after a normal walk. For desk days, refill the bottle before you reach for a sports drink.
Your morning coffee still counts toward hydration. Normal amounts of caffeine do not cancel the fluid in the cup. If coffee is most of what you drink, keep a water bottle nearby anyway.
Unopened bottled water keeps better indoors, out of direct sun and away from cleaners or paint. Keep the dates visible, rotate older stock forward, and give the emergency reserve its own shelf.
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