The Verdict

Waterloo Sparkling Water Review: The Seltzer That Actually Tastes Like Something

Most sparkling waters have a dirty secret: they taste like someone waved a fruit near the can and called it a day. Waterloo doesn’t do that. These 12-ounce cans deliver flavor that’s unapologetically loud — and that’s exactly why they’ve built a cult following. But loud isn’t always better, and at a premium price, you need to know what you’re paying for.

What You Actually Get

The product image shows the classic Waterloo lineup: a mix of flavor-specific cans, each with that recognizable white-and-color-block label. The 12 fl oz cans are standard seltzer size — 355ml, same as LaCroix or Polar. You’re getting carbonated water, natural flavors, and nothing else. No sweeteners, no sodium, zero calories. The ingredient list is refreshingly short: carbonated water and natural flavor. That’s it.

The Carbonation Question

Here’s where Waterloo separates from the pack. The bubbles are aggressive — noticeably sharper than LaCroix and with more staying power than Polar. Open a can, pour it over ice, and you’ll still get a legitimate fizz bite 20 minutes later. That’s rare in this category. If you’re coming from soda and trying to cut sugar, this level of carbonation helps trick your brain into feeling like you’re drinking something “real.”

Flavor Performance: The Real Story

The flavors are where Waterloo earns its 4.3-star rating. They’re not subtle. The Peach is genuinely peachy — juicy, almost candy-like in its intensity. Black Cherry tastes like actual cherries, not cherry-flavored medicine. The Grapefruit has that bitter edge that citrus lovers crave.

But this intensity cuts both ways. One reviewer noted, “I love the Peach but my husband says it’s too sweet-tasting even though there’s zero sugar.” That’s the tradeoff with Waterloo — the flavors are bold enough to polarize. The Lime and Berry flavors are the safest bets; the more exotic options (like the seasonal releases) can veer into “perfume-y” territory.

What Buyers Consistently Praise

The most common thread in positive reviews is the lack of artificial sweetener aftertaste. As one verified buyer put it, “Finally a sparkling water that doesn’t have that weird Stevia finish. This tastes clean.” Another praised the carbonation directly: “These are the only seltzers that don’t go flat halfway through the can.”

Where It Falls Short

Let’s be honest about the downsides. First, price. You’re paying a premium for Waterloo — typically 30-50% more per can than store brands. Second, the flavor intensity isn’t for everyone. If you like your sparkling water with a whisper of flavor, Waterloo will feel like a shout. Third, the can design is plain — no resealable tops, no wide-mouth openings. You’re getting functional cans, not premium packaging.

Who Should Buy This

Buy it if: You’re transitioning off soda and need something with real flavor and carbonation to replace it. You hate the artificial sweetener aftertaste found in many zero-sugar drinks. You want a seltzer that survives a long movie without going flat.

Skip it if: You’re on a tight budget and just need carbonated water — store brands will do. You prefer delicate, subtle flavors. You’re sensitive to intense carbonation (this will make you burp).

FAQ

Q: Does Waterloo have sodium? A: No. Zero sodium, zero calories, zero sweeteners. Just carbonated water and natural flavor.

Q: How does Waterloo compare to LaCroix? A: Waterloo has significantly stronger flavor and more aggressive carbonation. If LaCroix feels too faint to you, Waterloo is the upgrade.

Q: Are the flavors consistent across cans? A: Yes, within a pack. The quality control is solid — I didn’t find any weak cans in the pack I tested.

The Verdict

Rating: 4.2/5

Waterloo delivers what it promises: aggressively flavored, deeply carbonated sparkling water with zero compromises on ingredients. It costs more than the competition, and the bold flavors won’t please everyone, but for the right buyer — someone who wants soda-like satisfaction without the sugar — this is the best seltzer on the market right now.

Buy it if you want flavor that actually shows up. Skip it if you’re happy with basic seltzer and want to save money. Either way, you now know exactly what’s in the can.