Is Expensive Bottled Water Actually Better for You?

Water is supposed to be the simplest thing we consume. The premium bottled water industry has transformed it into something that requires a backstory.

Supermarket shelves now distinguish between glacial, iceberg, volcanic, spring, mineral, and alkaline water. Restaurants are introducing water menus, while trained water sommeliers assess bottles by their mineral composition, mouthfeel and provenance. At the extreme end of the category, Svalbarði Polar Iceberg Water sells Arctic water for as much as €100 (around $116) a bottle.

The category’s growth rests on a mixture of verifiable differences and carefully constructed associations. Water can contain different minerals. Those minerals can change how it tastes. But claims about purity, alkaline pH, and remote natural sources can also create the impression that expensive water must be healthier.

According to Michael Mascha, who founded the platform FineWaters in 2002 to train water sommeliers and drag premium bottled products out of the commodity aisle, prices often reflect remote sourcing and difficult transport rather than superior health benefits. Luxury water, he argues, is better understood as a dining experience than as a more effective source of hydration.

Does Expensive Water Hydrate You Better?

There is no established evidence that luxury water hydrates an otherwise healthy person better simply because it is more expensive or comes from a celebrated source.

“Fundamentally, true hydration is about consuming enough water throughout the day to replace daily losses rather than brand status or origin,” says Lucy Semerjian, associate professor of environmental science and technology at the University of Sharjah in the United Arab Emirates.

What matters most is drinking enough safe water to replace the fluid the body loses. Its chemical and microbial composition must also remain within safe limits.

Are the Minerals in Bottled Water Better for You?

Minerals are responsible for some of the genuine differences between waters. As water travels through soil and rock, it can absorb calcium, magnesium, bicarbonate, sodium, and other dissolved substances. Their type and concentration depend partly on the geology surrounding the source.

These minerals are already dissolved into ionized forms, meaning the gastrointestinal tract can absorb them. Mineral water can therefore contribute to a person’s calcium or magnesium intake, although its nutritional significance depends on the concentration, the quantity consumed, and the rest of that person’s diet.

The word “mineral,” however, does not tell consumers how much of any particular nutrient is present.

“People see terms like rich in minerals, high TDS numbers, or alkaline pH on a premium label and assume those are automatically markers of superior quality,” says Maria Abi Hanna, cofounder and CEO of nutrition intelligence software Food Label Maker, “when in reality none of those numbers tell you anything on their own.”

Total dissolved solids, or TDS, measures the combined concentration of dissolved substances in water. A higher number does not function as a score for safety, purity, or health. It mainly describes the water’s mineral load.

The same problem applies to alkaline water. Its higher pH is frequently positioned as a wellness advantage, but pH alone does not establish that a bottle is healthier. The stomach is already highly acidic, and the body tightly regulates the pH of the blood.

Consumers should instead look at which minerals appear on the label and in what concentrations. People limiting their sodium intake, for example, may have different priorities from someone specifically looking for a water containing calcium or magnesium.

Does Mineral Content Change How Water Tastes?

Minerals may not transform hydration, but they can transform taste.

“Some waters taste very light because they have very low mineral content,” Mascha says.

Rainwater that has had little contact with the ground may contain very few dissolved minerals. Iceberg and some glacial waters can also fall towards the low end of the TDS scale, producing a relatively light or neutral taste.

At the other end, water containing upwards of 2,000mg of mineral content can have a noticeably heavier mouthfeel and a stronger flavor. Individual minerals can introduce salty, bitter, chalky, or slightly sweet characteristics.

The differences are real. The leap from “tastes different” to “is healthier,” however, is usually where the marketing begins to outrun the evidence. Luxury water makes the most sense when treated as a taste category: something selected for a particular mineral profile, dining experience, or personal preference. The price is not a reliable shorthand for its nutritional value.

Is Glass-Bottled Water Safer Than Plastic?

The most consequential thing about a bottle of water, though, may not be the water itself.

Premium brands often use glass packaging, reinforcing the perception that the water is both luxurious and protected from the concerns surrounding plastic.

“Plastic bottles are sensitive to thermal stress, UV radiation, or extended storage times,” says Nidia Rodriguez-Sanchez, senior lecturer in physiology and nutrition at Scotland’s University of Stirling.

This is particularly relevant in hot climates. Leaving bottled water inside a vehicle or storing it for prolonged periods at high temperatures can increase the migration of substances from PET into the water. Studies have found that heat can increase the release of antimony, a substance used during PET manufacturing, although the concentrations vary by bottle, temperature, and storage time.

Glass is not an entirely plastic-free solution. A 2025 study led by France’s Agency for Food, Environmental and Occupational Health and Safety, or ANSES, found microplastics in beverages packaged in glass.

The glass itself was not identified as the main source. Researchers traced many of the particles to the painted coating on metal bottle caps, which could become scratched as the caps rubbed together during storage.

The results also varied by beverage. Soft drinks and beer in glass bottles contained considerably more particles than the same drinks in other packaging. Water contained far fewer particles overall, although glass-bottled water averaged slightly more than water packaged in plastic or cartons.

The study does not prove that glass packaging is more dangerous than plastic. It demonstrates that changing the bottle material does not eliminate every other potential source of plastic exposure.

Mascha’s response to all this is that the anxiety is selectively applied. “Everyone talks about microplastics in water. There’s also microplastics in wine, in beer, and in Coke,” he says.

This story originally appeared on WIRED Middle East.