You've probably asked yourself too if that old bottle of water in your pantry is still good to drink? Water is life, yet there are remaining questions about the shelf life. Whether you are stockpiling for emergencies or wondering if that bottled water left in a heated car is safe to drink, understanding if and how water "expires" is essential. This article goes into the science behind water storage and its potential risks and practical tips to ensure your water will remain safe and consumable.

Water itself does not spoil or degrade. Chemically, pure water (H₂O) remains unchanged indefinitely. However, there are issues that arise due to the containers in which it is stored and the environmental conditions surrounding the storage.

In the United States, most bottled water has an expiration date. This labeling is often misunderstood as being an indication of the water's safety, but it mainly has to do with quality. The U.S. Food and Drug Administration (FDA) confirms that commercially sealed bottled water is safe to drink indefinitely if stored properly. Over time, though, the taste, smell, and even the appearance of water may change due to interactions with its packaging.

Role of Packaging in Water Safety

Plastic Bottles and Chemical Leaching

Bottled water is mostly packed in polyethylene terephthalate, PET plastic. Even though it is light in weight, resistant, and recyclable, this material is limited in other aspects. It leaches chemicals in trace amounts in the water if heated or placed under direct sunlight. For instance, do not leave your bottled water in the hot car for an extended period.

The next is bisphenol A or BPA. This chemical has been used to soften some plastics and is known for its hormone disruption. Many producers have shifted toward BPA-free materials, but older bottles and improper storage still pose risks. Bottles carrying recycling code #7 may be BPA-contaminated. There are also concerns over microplastics and long-term storage.

Microplastics and Long-Term Storage

Over time, the plastic in the bottle may leach into the water, causing some to question health risks. In 2019, one article published in the International Journal of Environmental Research and Public Health noted that these particles exist but are usually not at high enough concentrations to pose a problem if the water is properly stored.

Also Read: What Happens When You Drink Too Much Water?

How Long Can Water Be Stored Safely?

Bottled Water

Unopened bottled water, kept in a cool, dark place, remains safe to drink for years. But manufacturers often advise that it should be consumed within two years of its manufacture date for best quality. After this period, it may start showing off-flavors or odors due to contact with the plastic.

Tap Water

Tap water, under the Environmental Protection Agency (EPA), undergoes strict standards for safety. It can be kept in pure, BPA-free bottles up to six months. Afterward, it loses its fresh flavor or becomes dirty if not properly sealed.

Rainwater

Don't drink rainwater unless treated first. It usually contains contaminants that should not reach the human stomach. It should be used to water plants if not filtered and sterilized first.

Signs That Water Has Gone Bad

Water itself doesn't go bad, but extrinsic factors make it unsafe. Always discard water that has:

An off smell: An earthy, metallic smell indicates contamination.

Coloration: Greenish or bluish coloration signifies microbial growth or rust.

Unpleasant taste: A metallic or stale taste is a hallmark of degradation.

Froth or particles: Indicate dirt, germs, or other impurities.

How to Store Water Safely?

Avoid Heat and Sunlight

Store water in a cool, dark place and out of direct sunlight. Heat breaks down the plastic, allowing chemicals to leach out more easily.

Choose the Right Containers

For long-term storage, select BPA-free or food-grade plastic containers. The best alternatives are stainless steel and glass containers, which avoid all the risks that plastic poses.

Hygiene Maintained

Wash and sanitize the container before refilling. Always seal the lids so that no bacteria get inside.

Rotate Your Stock

Use a first-in, first-out rotation system with stockpiled water. This will mean that you will use the oldest water first to keep your water supply fresh.

Is It Safe to Drink Water Past Its Expiration Date?

The expiration date on bottled water is a mark of its quality, not safety. Although the water is safe to drink past this date, it is sensible to check it for any signs of spoilage as mentioned above. Tap water that has been stored for longer periods should be checked for clarity and odor before consumption.

Plastic bottles, although convenient, degrade the environment. Only a few percent of PET bottles are recycled, while the rest remain in landfills or oceans. Choose reusable containers and tap water whenever possible to minimize plastic waste and environmental damage.

Water is one of the most precious resources in this world, yet it can be safe only if it is kept appropriately. People may tell you that water does not expire, but the fact is that packaging materials, exposure to the environment, and storage conditions may affect the quality of the water. Proper storage techniques, opting for BPA-free containers, ensure that water remains fresh, safe, and ready for consumption at any time.

Carbohydrates have unfortunately become one of the most misunderstood parts of the diet, particularly when it comes to weight loss.

Cutting out rice, roti or other carbohydrate-rich foods completely is not necessarily the answer. Carbohydrates are an important source of energy, and the issue is more about the quality, quantity and overall balance of the diet than the nutrient itself.

Why Cutting Carbs Completely May Not Be The Answer

For Indians, this becomes particularly relevant because staples such as rice, roti, poha, idli and other grain-based foods are an integral part of our traditional diets.

Removing them completely can sometimes make a diet unnecessarily restrictive and difficult to sustain. It may also mean missing out on foods that provide fibre, vitamins, minerals and other nutrients, particularly when whole grains and minimally processed sources are chosen.

Also read: The New Nutrition Gap: Why Knowing What To Eat Doesn't Mean We Actually Eat It

Not All Carbohydrates Are Created Equal

What matters is understanding the difference between refined and high-quality carbohydrate sources. A diet dominated by refined flour, sugary foods, sweetened beverages and highly processed snacks is very different from one that includes whole grains, millets, legumes, vegetables and appropriately portioned rice or roti.

The Bigger Picture Behind Weight Loss

Another common mistake is replacing carbohydrates with excessive amounts of protein or fat without considering the overall nutritional balance.

Weight loss ultimately depends on overall energy intake, dietary quality, physical activity, sleep and several other factors—not simply whether carbohydrates are present on the plate.

Also read: Protein Is In Everything, But Is Every Source Actually Healthy? Experts Explain

How To Build A More Balanced Indian Plate

A practical approach is to focus on portions and pair carbohydrates with protein, vegetables and healthy fats. For example, roti with dal and vegetables or rice with dal, vegetables and curd can form a balanced meal. Choosing less-refined carbohydrate sources and paying attention to portion sizes can make the diet both nutritious and sustainable.

Carbohydrates do not need to be feared or completely eliminated. The goal should be to eat the right kind, in appropriate portions, as part of a balanced diet rather than following the latest anti-carb trend.

Healthy eating is something every individual is aware of, not only because of various online conversations around it but also because it is one of the subjects that is being discussed widely amongst individuals today.

From taking up diet charts with the help of AI to taking details from social media reels shared by several wellness influencers – information about food and health is readily available for all age groups at any time and it is customised according to their preferences, thanks to our algorithms.

Most people are aware that a healthy diet includes vegetables, fruits, home cooked meals, adequate water intake, and most importantly, limited consumption of outside food like fried and processed foods.

Unhealthy Eating Habits Continue To Rise Despite Awareness

Also read: From Pickles to Papad: Which Everyday Indian Foods Could Be Worth Rethinking for Cancer Prevention?

Despite growing awareness amongst the population, unhealthy eating habits continue to rise, which is eventually contributing to various lifestyle diseases like obesity, diabetes, cardiovascular diseases, and other health issues.

For most people, lack of information and knowledge about nutrition is not a challenge anymore, but the inability to act on that knowledge and consistently following through the habits and incorporating them into day-to-day life is. This growing gap between knowing what to eat and not being able to follow through is called the new nutrition gap.

Many individuals understand what a healthy diet is? yet struggle due to busy schedules, long working hours, and stress. Also, the convenience of ordering food often leads to dietary choices, that do not support long-term health. It is common for individuals to skip meal preparation, rely heavily on packaged food and snacks or food from restaurants, and beverages during stressful times despite being aware of their harmful impact on health.

“Social settings” add another challenge to sticking to one’s diet as planned. Office celebrations, family gatherings, and social outings are often centred around calorie dense foods and sugary treats. In addition, many people follow an all or nothing approach to eating, believing that a single indulgence has undone all their progress. This mindset can also make healthy eating feel difficult and unsustainable in the long run.

Also read: Protein Is In Everything, But Is Every Source Actually Healthy? Experts Explain

Closing this gap does not require restrictive diets or unrealistic rules. It is about building small, practical and healthy habits that can follow consistently over time. To maintain the same, some of the following small habits can be helpful:

1. Make healthy the easy option

2. Stop punishing yourself

A healthy lifestyle is not determined by a single meal. Occasionally eating a vada pav or enjoying a dessert, festive treats are not going to harm long-term health when it is balanced with nutritious meals throughout the day. Instead of feeling guilty after eating an unhealthy food and worrying over its impact your progress, one should simply focus on continuing the prioritising balanced eating habits with their next meal.

3. Make it personal

Don't eat healthy because an influencer said so. Eat healthy because you want to feel lighter, sleep better, and not feel acidity every evening. It is important to take guidance from a professional like a Certified Registered Dietiian when you are not able to follow through with your diet or are facing any other challenge instead of depending solely on unreliable nutrition advice and social media trends.

Healthy eating becomes easier when one makes conscious choices of maintaining a balanced diet, regular meal planning, mindful eating, and realistic lifestyle changes.

By Vidisha Parekh, Chief Dietician at Lilavati Hospital and Research Centre, Mumbai

Indian cuisine is known for its delicious taste and varied nature. Often, pickles, papad, namkeen and preserved products form an essential part of our everyday diet.

However, in terms of cancer prevention, this is not about how much we should give up on these products. The question is about the frequency of consumption and its proportion to the diet as a whole.

Why Salt And Preserved Foods Need A Closer Look?

One of the first factors that requires revision is salt consumption. Pickles and papad may be quite salty and even if we consume them from time to time or in small quantities.

High levels of salt in the diet have been linked to the higher risk of developing stomach cancer. Salt may irritate the stomach walls and promote the development of conditions which make the stomach more susceptible to other carcinogens. According to the World Health Organization, we should not consume more than 5 grams of salt a day.

It is not about the risk of consuming a small portion of homemade pickles with lunch. What really matters is the frequent and intensive consumption of salty and preserved foods, in combination with an unhealthy diet. Processed meat is another category to look out for. Sausages, salamis, bacons, and all types of meat products that are cured or preserved increase the risk of colon and rectal cancers.

Among Indians, consumption of processed meat products, such as some packaged meat preparations, may also be something to take into account. The inclusion of these foods in the diet is better minimized than made a constant feature of the diet.

Also read: Protein Is In Everything, But Is Every Source Actually Healthy? Experts Explain

When Everyday Snacks Become A Bigger Concern?

There are foods which may not be traditionally categorized as “unhealthy” but become unhealthy when consumed excessively—fried snacks, farsan, namkeen, sweets, sodas, highly processed packaged foods.

Frequent consumption can lead to an intake of excessive calories and result in gaining weight. Having too much body fat increases the risk of cancer itself.

Also read: Diabetes Diet: Build A Balanced Plate, Not Just Cut Carbs, Doctors Explain

What To Put On The Plate Instead?

Then, what to replace these foods with? Not expensive “superfoods”. More vegetables, fruits, pulses, beans and whole grains in the diet will protect you from cancer much better than eating these unhealthy foods. As per WHO, people older than 10 years old need at least 400 grams of fruits and vegetables on a daily basis.

It comes down to a simple point: cancer prevention is not based on fear of particular foods; it is based on making improvements in our dietary intake. We don’t need to sacrifice our food culture; we just need to add balance to it: less salty foods, less processed foods, more fiber-containing plant foods and proper servings.

Foods constitute one of many aspects of cancer prevention, in addition to abstaining from tobacco, alcohol moderation, maintaining a healthy body weight, physical activity and regular screenings.

It is not about making our traditional thali unpalatable. It is about making decisions that benefit us now and protect our future.

By Dr Nitin Bayas, Oncologist, MOC Cancer Care, Mumbai