What Is a Seltzer? The Complete Australian Guide (2026)

A seltzer is carbonated water — water that's been infused with carbon dioxide so it fizzes. That's it, at the simplest level. Modern seltzers split into two camps: seltzer water (non-alcoholic, sometimes lightly flavoured, zero sugar) and hard seltzer (alcoholic, lightly flavoured, usually 4–5% ABV). Both deliver bubbles and refreshment. Only one will get you tipsy.

If you've landed here mid-bottle-shop, mid-supermarket, or mid-conversation about why everyone suddenly cares about seltzer — here's the full picture. What it is, what it isn't, how it's made, and what's worth drinking in Australia in 2026.

A Seltzer Is Just Carbonated Water (Sometimes With Extras)

The word "seltzer" comes from Selters, a town in Germany whose mineral spring water was so reliably bubbly that "Selterswasser" became European shorthand for any naturally carbonated water from the 1700s onwards. The name travelled, the spring didn't, and today "seltzer" mostly means artificially carbonated water — water plus carbon dioxide pumped in under pressure.

That base is the foundation. From there, brands add flavour (or don't), alcohol (or don't), and call the result a seltzer. So when you see "seltzer" on a can in Australia, you're really being asked one further question: which kind?

The Two Types of Seltzer in Australia in 2026

1. Seltzer water (non-alcoholic)

This is carbonated water, full stop. No alcohol, usually no sugar, sometimes a hint of natural fruit flavour. Think Capi, Nexba, La Croix (imported), supermarket house-brands. You'll find it labelled as "seltzer," "soda water," "sparkling water," or "mineral water" — the names get used interchangeably in Australia, which doesn't help anyone trying to figure out what they're holding.

Roughly: if it's carbonated water in a can or bottle and it's stocked in the soft-drink aisle, it's seltzer water. Zero standard drinks. Zero kilojoules. Just bubbles.

2. Hard seltzer (alcoholic)

This is where the category gets interesting. Hard seltzer is alcoholic — typically 4–5% ABV — usually flavoured with real fruit or fruit essence, and lower in sugar than most beers, ciders or pre-mixed cocktails. Brands include Coco Loco, FELLR, White Claw, Hard Fizz, Saintly, Mode and Pals. You'll find hard seltzer in the bottle shop, never the supermarket — the alcohol classification means it's age-restricted at retail.

If "hard seltzer" sounds like a marketing word, that's because it kind of is. The category had to invent a label to distinguish itself from beer, cider and the broader RTD shelf. The term has stuck — and the category, in Australia, is forecast to grow from around AUD 142 million in 2024 to AUD 344 million by 2030. Bubbles are clearly going somewhere.

How a Hard Seltzer Gets Its Alcohol

This is the bit most people don't realise. The label "hard seltzer" doesn't tell you how the alcohol got into the can. There are two methods, and they produce different drinks.

Brewed (fermented) hard seltzer

The alcohol is created through fermentation — yeast converting a sugar source into alcohol — exactly like beer or wine, just with a different starter ingredient. Some brands ferment cane sugar. Some ferment rice and corn. Coco Loco ferments real coconut water. FELLR uses rice and corn. Moon Dog Fizzer uses real fruit juice.

The trade-off: brewed hard seltzers tend to have more body, a fuller mouthfeel and a cleaner finish. The yeast eats most of the natural sugar in the process, leaving the drink low-sugar by design. They also tend to cost more to produce — fermentation takes weeks, not minutes.

Spirit-mixed (or "spirit-based") hard seltzer

The alcohol is added to the can. A neutral spirit — almost always vodka — is blended with carbonated water and natural flavours. No fermentation, no yeast, no waiting. Brands taking this route: Smirnoff Seltzer, Pals, Vacay, Good Tides, Hard Rated.

The trade-off: faster and cheaper to produce, more uniform flavour, but often a longer ingredient list and a more "neutral" taste — closer to a vodka, lime and soda than a brewed beverage. Australia classifies these differently for excise tax, which sometimes means a higher shelf price despite the simpler production.

For a deeper dive on the difference and why it matters for taste and ingredients, the brewed-vs-spirit-mixed comparison breaks it down further.

What Separates a Good Seltzer from a Forgettable One

Most hard seltzers on shelf taste roughly the same. The good ones earn their place through five things:

• Real fermentation over spirit-mixing — fuller flavour, fewer artificial notes, ingredient list you can actually pronounce.
• Sugar under 5g per can — a benchmark most brewed hard seltzers hit naturally; below 4g is excellent.
• Real fruit, not flavour essence — check the ingredient list. "Natural flavours" is often a category that lets a brand skip the actual fruit.
• Australian-made, where possible — local brands tend to be more transparent on sourcing, more attached to ingredient quality, and you're keeping the supply chain short.
• One standard drink per can — sessionable, predictable, easier to pace. Anything materially over 1.0 standard drink is asking you to do mental arithmetic mid-sip.

If you cross-check those five against any can of seltzer in your hand, the answer to "is this worth drinking?" usually arrives quickly.

Where Coco Loco Sits

Coco Loco is Australia's only brewed alcoholic coconut water hard seltzer. We start with young green coconut water — not vodka with coconut flavour added — and ferment it. The yeast eats most of the natural sugar to produce the alcohol, leaving 3.6g sugar per 330ml can, 4% ABV (one standard drink), gluten-free, vegan, and made in regional Victoria.

The flavour difference is real: brewing the coconut water keeps the flavour notes and electrolytes that fermentation preserves, instead of trying to imitate them with extracts. Two flavours in market: Piña Colada (light, creamy, tropical) and Passion Spritz (bright, zesty — tastes like the soft drink Passiona, but at one standard drink).

Available direct from drinkcocoloco.com in 6, 12, 18 and 24-pack formats, including mixed packs if you can't pick. Ships Australia-wide.

The Australian Seltzer Brand Landscape

If you want the wider category map — what's brewed, what's spirit-mixed, what tastes good and what doesn't — we've ranked the 12 best hard seltzers to buy online in Australia, including the imports (White Claw, Smirnoff Seltzer, Pals from New Zealand) and the local independents (FELLR, Hard Fizz, Saintly, Mode, Framer, Coco Loco). Use it as a shortlist next bottle-shop run.

How to Pick the Right Seltzer for the Moment

Different occasions, different choices:

• Sober afternoon, hot day — seltzer water with lime (Capi, Nexba). All hydration, zero alcohol.
• Light social drink, picnic or pool day — brewed hard seltzer at 4% ABV, one standard drink per can. Coco Loco, FELLR. Sessionable, easy to pace.
• Big night, more lift — higher-ABV hard seltzer (5–6%) or a spirit-mixed option. Pals or FELLR Double Double.
• Watching sugar or carbs — under 4g sugar per can. Most brewed hard seltzers fit. Plain seltzer water is zero.
• Gluten-free — most hard seltzers are gluten-free by design. Always check the label, but the category is friendly here.

The seltzer category is unusual in that there isn't really a wrong answer — the worst-case scenario is "I picked one I don't love." Lower stakes than picking a wine. More forgiving than picking a craft beer.

Frequently Asked Questions

Is a seltzer alcoholic?

It depends on the type. Plain seltzer water is non-alcoholic — just carbonated water with optional natural flavour. Hard seltzer is alcoholic, typically 4–5% ABV, made by fermenting a sugar source or mixing a neutral spirit with carbonated water and flavour. The label tells you which one you're holding. If it's stocked in a bottle shop, it's hard seltzer. If it's in the supermarket fridge, it's almost certainly seltzer water.

What's the difference between seltzer and sparkling water?

Practically speaking, very little. Both are carbonated water. "Sparkling water" tends to refer to naturally carbonated water from a mineral spring or artificially carbonated mineral water. "Seltzer" is more commonly used for flavoured varieties and almost universally for the alcoholic version. In Australia, "soda water" is the everyday term for plain bubbly water — though all three labels can mean the same thing depending on the brand.

How is hard seltzer made?

Two methods. Brewed hard seltzer ferments a sugar source — cane sugar, fruit juice, rice, or coconut water — to produce alcohol naturally, the same fundamental process as beer or wine. Spirit-mixed hard seltzer takes a neutral spirit (usually vodka) and blends it with carbonated water and flavour. Brewed has more body and a cleaner finish. Spirit-mixed is faster and cheaper to produce. Check the label or ingredient list to tell which method was used.

What's the lowest-sugar seltzer in Australia?

Most brewed hard seltzers in Australia sit between 0.2g and 4g sugar per 330ml can. FELLR is around 0.2g. Coco Loco is 3.6g (residual natural sugar from real coconut water). White Claw and Smirnoff Seltzer are typically under 2g. Spirit-mixed seltzers like Pals come in around 3g. Plain seltzer water is zero sugar by definition.

Is seltzer the same as hard seltzer?

No. "Seltzer" alone usually means non-alcoholic carbonated water, sometimes lightly flavoured. "Hard seltzer" specifically means the alcoholic version. The distinction matters at the bottle shop and at the checkout. If a recipe or article references "seltzer" generically and you're not sure which is meant, default to assuming non-alcoholic unless context says otherwise.

How many calories are in a hard seltzer?

Most brewed hard seltzers in Australia sit between 90 and 120 kilocalories per 330ml can. Coco Loco is around 115. FELLR is around 85. White Claw is around 95. By comparison, a full-strength lager is typically 130–155 calories per 375ml, and craft beers can reach 170–250+. Plain seltzer water is around 0 calories.

Is hard seltzer better than beer?

We can't make health claims about alcohol — alcohol is alcohol regardless of the format. What we can say factually: brewed hard seltzers are typically lower in calories, lower in sugar and lower in carbs than most beers, and are usually gluten-free. Whether that matters to you depends on your dietary priorities, not a category label.

The Bottom Line

A seltzer is carbonated water. The hard part — literally — is the alcohol layer some seltzers add through fermentation or spirit mixing. Both have their moment. Australian seltzer drinkers in 2026 are increasingly choosing brewed over spirit-mixed for cleaner taste, fewer ingredients, and the simple satisfaction of knowing the alcohol came from real fermentation rather than a plastic-bottled vodka pour.

If you want to taste what brewed coconut water hard seltzer actually drinks like — Australia's only one — start with the Mixed Pack. Six of each flavour, free shipping over $120, and one standard drink per can.

And if you want to go deeper on the category before buying, our guide to what a hard seltzer actually is covers the alcoholic side in more detail.