Most of these names describe water with carbon dioxide dissolved under pressure. What separates them is the source of the water and whatever else the producer adds: mineral salts, flavour, quinine, sugar or sweetener.
The terms are not applied identically in every market. In Malaysia, the ingredient list and nutrition panel are the dependable way to tell what a particular bottle or can contains.
The Quick Answer
Scroll table horizontally →
| Type | Usually means | Calories | Useful for |
|---|---|---|---|
| Sparkling water | Water + CO₂; a broad category that may be naturally or artificially carbonated | Usually 0 when plain | Everyday drinking |
| Seltzer | Plain water + added CO₂, normally without added mineral salts | Usually 0 when plain | Drinking, adding fruit or mixing |
| Club soda | Carbonated water + added mineral salts; the exact recipe varies | Usually 0 | Cocktails and mixed drinks |
| Soda water | A regional term that may mean club soda or simply carbonated water | Check the label | Drinking or mixing, depending on ingredients |
| Tonic water | Carbonated water + quinine + sugar or sweetener | Varies; regular versions contain sugar | Drinks specifically calling for tonic |
| Mineral water | Water from a recognised underground source with naturally present minerals; still or sparkling | Usually 0 when plain | Drinking and cooking |
One-minute shopping rule
For plain everyday fizz, look for water and carbon dioxide in the ingredients, zero sugar on the nutrition panel, and no flavour acids. For club soda, tonic water or flavoured products, read every line rather than relying on the front-of-pack name.
Sparkling Water
Sparkling water is the broadest everyday term. It can describe water that emerges carbonated at the source, or still water carbonated later by injecting food-grade CO₂ under pressure.
Plain sparkling water can be nothing more than water and bubbles. Some products sold in the same aisle add flavour, acids, minerals, sugar or sweetener, so “sparkling” by itself is not a complete ingredient description.
For hydration, the US Centers for Disease Control and Prevention lists sparkling water and seltzer among low- or no-calorie drink choices. That applies to the unsweetened versions, not every flavoured can carrying a similar name.
Seltzer Water
Seltzer generally means plain water that has been artificially carbonated, without the mineral salts commonly associated with club soda. In practical terms, it is very close to plain artificially carbonated sparkling water.
The word is most common in North America. Malaysian supermarkets and restaurant menus are more likely to say “sparkling water” or “soda water”. If an overseas recipe asks for seltzer, a plain, unsweetened sparkling water is normally the closest local substitute.
Flavoured seltzers are a separate check: some contain only natural flavour, while others can include citric acid, sweeteners or sugar. Use the ingredient list to decide whether the product is still suitable for the purpose.
Soda Water and Club Soda
Club soda is manufactured carbonated water with mineral salts added for flavour and balance. Sodium bicarbonate is common, but recipes can also use sodium citrate, potassium salts or other permitted ingredients.
Those additions can make club soda taste rounder, slightly salty or less sharp than plain sparkling water. They also mean sodium is not identical across brands; check the nutrition panel if you are limiting sodium.
“Soda water” is less precise. A bar may use it to mean club soda, while a retailer or appliance maker may use it for plain carbonated water. The US FDA treats sparkling water, seltzer, soda water, tonic water and club soda as soft-drink descriptions rather than bottled-water identities, another reason not to assume one universal recipe from the label name.
Tonic Water
Tonic water is the outlier. Its defining bitter ingredient is quinine, and regular tonic is sweetened to balance that bitterness. Low- or no-sugar versions use other sweeteners.
That makes tonic a flavoured mixer, not a direct substitute for plain sparkling water. Sugar, energy and sweetener choices vary by product and serving size, so use the Malaysia nutrition panel instead of carrying over a number from another brand or country.
Use tonic when a drink specifically calls for its bitter-sweet flavour. Replacing soda water with tonic will materially change a highball, mojito or whisky soda.
Mineral Water
Mineral water is defined by its source and naturally occurring mineral content, not by bubbles. It can be still or sparkling. Malaysia’s Ministry of Health regulates natural mineral water and packaged drinking water under the Food Regulations 1985.
The mineral profile can include calcium, magnesium, sodium, potassium and bicarbonate, in amounts that vary with the underground source. Carbonation may be naturally present, restored after processing or added, depending on the product and its permitted labelling.
Read the source statement, mineral analysis and carbonation description on the bottle. A high-mineral sparkling water will taste different from lightly mineralised water even when both are unsweetened and zero-calorie.
Which Is Healthiest?
For an everyday drink, plain unsweetened sparkling water or seltzer is the simplest carbonated choice. It provides the fizz without the sugar of regular tonic water or a sweetened soft drink.
Plain club soda can also be a zero-calorie choice, but its added sodium varies. Mineral water may contribute minerals, though the amounts differ by source and it should not be treated as a substitute for a balanced diet.
Plain sparkling water is mildly acidic because of carbonation. The American Dental Association says it is generally fine for teeth, while advising extra care with citrus-flavoured or sugar-added versions. If you drink fizzy water frequently, plain is the lower-complexity choice; have more acidic flavoured drinks with a meal rather than sipping them throughout the day.
Individual medical needs can change the answer. If you have been told to restrict sodium, sugar, fluids or particular minerals, use the product label and your clinician’s advice.
Which Should You Use For…?
Daily drinking
Plain sparkling water or seltzer
Choose an unsweetened product with a short ingredient list, or carbonate filtered water at home.
Cocktails
Club soda—or tonic when specified
Club soda keeps most mixed drinks neutral. Tonic adds bitterness and sweetness, so it is not interchangeable.
Cooking and batter
Plain sparkling water
Bubbles can help create a lighter batter. Avoid tonic and strongly mineralised or flavoured products unless the recipe is designed for them.
Replacing sweet drinks
Unsweetened fizz with fresh garnish
Add mint, cucumber or a small squeeze of citrus if desired, while remembering that frequent acidic flavour additions matter to teeth.
Common questions
Frequently Asked Questions
Is soda water the same as sparkling water?
Sometimes in everyday use, but not reliably. “Sparkling water” is a broad term for carbonated water. “Soda water” may mean club soda with added mineral salts, or it may mean plain carbonated water. Check the ingredients.
Can I use tonic water instead of soda water?
Only if you want tonic’s bitter-sweet flavour. Regular tonic contains quinine and sugar, while soda water is normally neutral and unsweetened. The substitution changes the drink.
Is plain carbonated water hydrating?
Yes. Plain sparkling water contributes to fluid intake, and the CDC includes sparkling water and seltzer among low- or no-calorie drink choices. Added sugar or flavour does not remove the water, but it changes the overall nutritional and dental picture.
Is carbonated water bad for your teeth?
The ADA says plain sparkling water is generally fine for teeth. Flavoured products can be more acidic and sugar-added versions increase cavity risk, so read the label and avoid slowly sipping acidic drinks all day.
Why does club soda taste different?
Added mineral salts affect its flavour and can soften the sharp impression of carbonation. Recipes vary, which is why one club soda can taste saltier or more mineral-forward than another.
Can HydroSpark+ make club soda or tonic water?
HydroSpark+ carbonates filtered water, producing plain sparkling water. Add any flavouring only after dispensing and follow the appliance manual. Club-soda mineral blends and tonic ingredients are separate additions, not part of its water path.
Sources checked 27 July 2026
Sources and regulatory context
- Malaysia Ministry of Health: Food Regulations 1985
- Malaysia Ministry of Health: natural mineral water and packaged drinking-water licensing
- US FDA: bottled-water identities and carbonated soft-drink terminology
- US CDC: water and lower-calorie drink choices
- American Dental Association: sparkling water and teeth
- Velta HydroSpark+ Malaysia user manual