Although conventional wisdom holds that humans need eight, 8-ounce glasses of water each day, the truth is a little more complicated. According to The National Academies of Sciences, Engineering, and Medicine, an adequate daily fluid intake is about 125 ounces (3.7 liters) for men and about 91 ounces (2.7 liters) for women. However, keep in mind that these fluid intake guidelines include all sources of water, not just glasses of the stuff. In fact, we get about 20 percent of our daily water from what we eat, especially fruits and vegetables.

The truth is that when it comes to hydration, one size does not fit all. There are many factors that should influence an individual’s daily water intake, including where you live, your activity level, and your overall health. So while there is no scientific evidence that supports the “8x8 rule,” staying hydrated is still important. The best advice is to trust your own body, and when you’re thirsty, reach for water first.

If you try to freeze water, juice or other liquids in a closed plastic container without leaving room for expansion, your container will crack or burst. I fill plastic bottles or jugs with liquid, leaving plenty of room at the top for expansion. Once the liquid is frozen, then you can safely tighten the lid and then when you want to take it off use warm water to wash it then take it off.

The reason why it's a bad idea to freeze water in a sealed plastic container is because the container can break. I would say if the water bottle is full and you freeze it then burst open and then it will be an even bigger mess then if you just started with a half full bottle. Which works just as well.

Leave at least a 1/4 of the plastic without water because water expands.

Other notes:

Jugs of ice keep the freezer from having to work as hard to cool the compartment, assuming you don't keep your freezer space full of food. In the event of a power outage the chunks of ice can help prevent the loss of your food for a little longer. It is NOT indefinite, but it does help for brief periods of time. My freezer lasted two days during a summer hurricane.

There is a myth going around that freezing water in a plastic container causes the plastic to release dioxin, and thereby causes breast cancer. This is not true.

All companies that produce consumables must, by federal law, have an expiration date on it. Since bottled water is a consumable the company must put a expiration date on it.
Also some water becomes impure due to plastic melting or substances released into the water by the plastic.

Here are opinions and answers from WikiAnswerers:

• So that if you don't drink the water by that date you have to go out and buy a new bottle, thus creating more profit for the company which sold you the water

• There is a chance that over time (years), the container could cause the water to have a different taste. There is much more information at the website in the Links section.

• There are two main types of sterilization that all food and drink manufacturers use. The first is the use of peracetic acid that gives an instant kill to most pathogens (bugs that make you ill). The second is the use of steam. Holding a steam temperature of above 120 degrees in the product line for 15 minutes will kill virtually all pathogens. However, some bacteria form spores which are virtually indestructible and can last for millions of years. The only way to make totally sterile drinks would be to irradiate them, which wouldn't make them radioactive, but would make them cost a great deal of money to produce. Thus, the manufacturer cannot guarantee that their product is free of pathogens and gives it a 'use by' to minimize their liability. Packaging deterioration is the other reason for the "Best By" Date.

Please do not make the mistake of thinking that "Bottled Water" means pure, sterile, perfect water. It may surprise you to know that there is very little regulation concerning 'bottled water'. For example, it is common practice to label the bottle with such things as " Spring Water" or "Mountain fresh" while the water is actually taken directly from municipal sources! Look for yourself at the fine print and see.

The information above is accurate and well written. Irradiation is, however, not all that expensive, as all that is required is to expose the water to a radioactive source. It is very passive. The problem is that consumers are less than excited about drinking "irradiated" water. The second problem is planned obsolescence. Water with a shelf life must be replaced whether it is consumed or not, which increases sales.

Bottled water is, for the most part, an ecological disaster. The plastic is not fully recycled--much of it ends up in land fills, or burned in waste to energy plants. Also, municipal water supplies are just as safe, and frequently safer, than bottled water--which often comes from municipal water supplies--as noted above.

Here are additions to the answer:

It is just giving warning that it will taste different from what it did when bottled.

They're is an expiration on water bottles because most of the time companies will put fluoride in water and the fluoride expires so they need an expiration date

Bottled water is pointless, If you had to choose between water that had chemicals put into it or natural pure water, the natural water is better because it has fluorine in it and most of the bottled water won't have fluorine. Plus, how can water expire within a protected container? Because plastic would take a long time to decompose and water wouldn't expire in it.

Water kept in a plastic container is harmful because bottles are made up of toxic substances which are harmful for both animal and plant life.In nature, as per its property water flows which keeps it clean and pure, not allowing any source of crude deposition. But water if kept enclosed for a prolong period allows anaerobic algae and other microbes to grow in it;making it unsafe and unfit for potable use. Hence, pouched water possesses an expiration date on it. The plastic chemicals will get to it. The water can go stale, too.

Actually, water is used in many ways in the USA, including:

• drinking water
• to help swallow when taking medications
• to make a cloth wet for use on a hot forehead or neck
• for cooking
• to freeze into ice or ice cubes
• washing dishes
• washing hands frequently
• to flush a toilet
• brushing teeth
• taking showers
• taking baths (or partial wash-up)
• washing hair
• washing clothes
• cleaning house
• cleaning objects, for example, to clean eyeglasses
• to clean windows
• washing a car / vehicle
• to water indoor plants
• to water outdoor plants, or a garden
• to water lawns (restricted in many cities and States due to water shortages)

Water is also used in the USA for:

• daily water needs for farm animals
• daily water needs for domesticated animals
• certain mills or heavy manufacturing companies
• other manufacturing (such as a beauty aids manufacturer, etc.)
• during certain types of construction
• to mix certain construction or other types of products, for example, to make cement; to dilute a cleaner or personal product
• for the manufacture of block or chipped ice for later sale (commercial and personal use)
• waste treatment plants
• to flush city water or sewage lines
• as a spray during dry months for street cleaning (limited, and not done in all cities)
• to leave drip from a faucet during below zero temperatures to prevent a water pipe from freezing
• in some areas, for the annual "ice sculpturing" done in some cities
• to use in ice rinks, or hockey rinks

CAN DRINKING WATER HELP YOU TO LOSE WEIGHT

Water can help in several ways.

As part of a total approach to weight loss, water helps by making you feel full and keeping you hydrated to improve all bodily functions. Water is also an essential nutrient for health and to sustain life.

In addition, the thermogenic effect of drinking chilled water can help.

Water contains no calories, sugars, carbonation, or protein. Even though it lacks nutrients it still puts no unhealthy chemicals in your body. If you drink a glass of water before eating, it will help you feel full.

Therefore, as part of your weight loss plan, the thermogenic effect of chilled water can help. For information about the thermogenic effect of drinking chilled water for weight loss, and how to apply it to burn more calories, see the page link listed below.

• WATER FOR WEIGHT LOSS