The amount of water you should drink daily varies based on factors like sex, activity level, climate, and health, but general guidelines exist:

• For healthy adult men, about 15.5 cups (3.7 liters or 124 ounces) of fluids per day is recommended.
• For healthy adult women, about 11.5 cups (2.7 liters or 92 ounces) of fluids per day is recommended

This total includes all fluids consumed, not just plain water, as about 20% of daily water intake typically comes from food like fruits and vegetables

. In terms of water bottles, if you use a standard 24-ounce bottle:

• Women should drink about 4 bottles per day.
• Men should drink about 5 bottles per day

If you use a 32-ounce bottle:

• Women should drink about 3 bottles.
• Men about 4 bottles daily

The classic "8 glasses a day" rule (about 64 ounces) is a simple guideline but often underestimates the actual needs for many adults

. You should also adjust your intake based on:

• Physical activity: More exercise means more water loss through sweat, requiring increased intake.
• Climate: Hot or humid weather increases thirst and water needs.
• Health conditions or medications may alter your hydration requirements

In summary, aim for roughly 3 to 4 liters for men and 2 to 3 liters for women daily, tracking your intake with your water bottle size to meet these goals, and adjust based on your lifestyle and environment.