Splashberry Dunkin’ Zero: Price, Calories, Ingredients & Real Review

Splashberry Dunkin’ Zero is a Watermelon and Blackberry blend from Dunkin’s zero-sugar energy drink line, Dunkin’ Zero. A medium contains 20 calories, 0 grams of sugar, and 145 mg of caffeine sourced from a mix of caffeine and guarana. It launched on July 8, 2026, as part of Dunkin’s second wave of summer Zero flavors alongside Watermelon Lime, Heatwave, and Melon Paradise.

That’s the short version. If you’re trying to figure out what Splashberry actually tastes like, what’s in it, what it costs, and where it ranks against the rest of Dunkin’s now ten-flavor Zero lineup — here’s everything, verified against Dunkin’s own menu data and cross-checked with independent taste tests.

Quick Answer: Splashberry at a Glance

The Second Wave: Why Splashberry Exists

Dunkin’s original six Zero flavors — Blackberry Tangerine, Tropical Mango, Juicy Peach, Glamberry, Sunzest, and Blushpop — launched back in March 2026. Splashberry wasn’t part of that first drop. It arrived four months later, on July 8, as part of a four-flavor summer expansion that also introduced Watermelon Lime, Heatwave, and Melon Paradise.

That expansion pushed the whole Dunkin’ Zero platform to ten flavors by fall 2026, and it shifted the flavor direction: where the original six leaned tropical and citrus, the summer wave leaned harder into melon and berry — flavors built specifically to read as “peak summer” rather than the golden-hour branding of the spring launch.

Splashberry keeps Dunkin’s naming pattern going — a mood-based name rather than a literal ingredient list — but unlike Sunzest or Glamberry, it isn’t a blend of two existing standalone Zero flavors. It’s a standalone combination in its own right: watermelon and blackberry, built together from the start rather than mixed from the original six.

The Flavor Breakdown

Splashberry combines two of Dunkin’s more assertive fruit notes:

• Watermelon brings the light, juicy, high-summer sweetness that anchors most of the July 8 lineup.
• Blackberry adds a deeper, slightly tart berry note that keeps the drink from tasting one-dimensionally sweet.

Dunkin’ describes Splashberry as “packed with delicious flavors of juicy watermelon and blackberry,” and in a separate campaign description calls it “a bright, zero-sugar energy sip mixed with juicy watermelon lime and blackberry flavors, finished with sparkling water.” The watermelon leads; the blackberry follows underneath as a darker, fruitier finish rather than a dominant flavor.

Splashberry Nutrition: Calories, Caffeine, and Sugar by Size

Caffeine figures for small and large sizes are estimated proportionally from Dunkin’s confirmed medium-size figure of 145 mg, since Dunkin’ does not publish an official per-size caffeine breakdown. For an exact number at your size, check the Dunkin’ app’s calorie calculator or ask in-store.

For context, 145 mg of caffeine is roughly equivalent to two shots of espresso — a meaningful jolt for a drink with only 20 calories. See our full Dunkin’ Donuts nutrition guide for how that compares across the rest of the menu.

What’s Actually Inside Splashberry

Like the rest of the Dunkin’ Zero line, Splashberry is built on a sparkling water base, flavored with zero-sugar syrups and layered with a small energy blend:

• Allulose, stevia, and erythritol — the sweetener system. Allulose is a newer zero-calorie sweetener that many people find avoids the metallic aftertaste associated with older sweeteners like aspartame.
• Guarana seed extract — a plant-based caffeine source, used alongside standard caffeine.
• Taurine and B-vitamins — common functional-energy-drink additions.
• Maltodextrin — used in small amounts to stabilize the caffeine and vitamin blend, contributing a negligible amount of carbohydrate.

The drink is dairy-free and contains no animal-derived ingredients, making it vegan at its base recipe — see our full allergen menu for details on other items.

Taste Test Verdict: What Reviewers Actually Think

Independent coverage of Dunkin’s July 8 summer wave has been more mixed than the reception Sunzest got back in spring. Tasting Table’s review of the same launch batch — which included Splashberry, Watermelon Lime, Heatwave, and Melon Paradise — was blunt about the wider drop, criticizing several of the new flavors for tasting like an ambiguous non-flavor dominated by the sweetener system rather than the advertised fruit.

Splashberry itself hasn’t drawn that specific criticism in available reviews, and its two-fruit combination gives it a clearer flavor identity on paper — watermelon up front, blackberry underneath. Consumer chatter on social platforms has focused more on curiosity about what’s actually in it than strong opinions either way, which tracks with a newer flavor that hasn’t built up the review volume Sunzest has.

Bottom line: Splashberry is one of the more distinct flavors in Dunkin’s July 2026 batch rather than a blurred melon-citrus blend, but it hasn’t yet earned the kind of consistent “best in the lineup” praise that Sunzest has. Worth trying if you like watermelon-forward drinks; approach the rest of that same summer wave with slightly lower expectations.

Splashberry vs. Heatwave vs. Melon Paradise

All four July 8 flavors target the same “peak summer” niche, but they land differently:

Nutritionally, all four are identical — same calories, same sugar, same caffeine. The difference is purely flavor, and reviewer consensus suggests Splashberry and Watermelon Lime have the clearer flavor identity of the four, while Heatwave and Melon Paradise read as less distinct.

Splashberry Price: What You’ll Actually Pay

Prices for Dunkin’ Zero vary by location, franchise, and ordering channel, so there’s no single nationwide number that applies everywhere. Based on available pricing data, a medium Dunkin’ Zero — including Splashberry — generally falls in the same $3.49–$4.99 range as the rest of the lineup in-store.

A few things worth knowing before you order:

• Delivery apps run noticeably higher. Third-party delivery platforms have listed Splashberry at $6.61–$8.06 depending on size, which reflects delivery markup layered on top of the base menu price — not Dunkin’s standard in-store pricing. That markup is even steeper than what’s typically seen on the original six flavors, so ordering in-store or through the Dunkin’ app is worth it here.
• Watch for seasonal promos. Dunkin’ has run National Watermelon Day and other summer-specific Rewards offers that included Splashberry alongside Heatwave and Melon Paradise. Check the Dunkin’ Rewards app for current deals before ordering.
• Rewards membership helps. Ordering through the Dunkin’ app as a Rewards member is generally the most reliable way to catch current pricing and any active deals.

For a wider look at what things cost across the menu, see our Dunkin’ Donuts menu with prices guide.

Is Splashberry Dunkin’ Zero Healthy?

Reasonably, for what it is. At 20 calories and 0 grams of sugar, Splashberry is one of the lowest-calorie drinks on the entire Dunkin’ menu, and it avoids the 25–37 grams of sugar typical of a Dunkin’ Refresher.

That said, it’s still an ultra-processed, engineered beverage — the calorie and sugar savings come from sweeteners and a flavor system, not from meaningful nutritional content. The B-vitamins and taurine are present in the small amounts typical of functional energy drinks, not enough to count as a significant nutrition source. Splashberry is a reasonable lower-sugar swap for a sugary Refresher or soda, but it’s best treated as an occasional caffeine option rather than a daily hydration choice.

How to Order Splashberry

Splashberry is listed under Dunkin’s “Refreshing Sips” menu category, alongside the other nine Dunkin’ Zero flavors and Dunkin’s full Refreshers lineup. It’s available in-store, through the Dunkin’ app, and via major delivery platforms, in small, medium, and large sizes. No modifications are typically offered — Dunkin’ Zero flavors are sold as-is, without milk or sweetener customization, since the entire point of the line is a fixed zero-sugar formula.

Splashberry Dunkin’ Zero FAQ

When did Splashberry Dunkin’ Zero launch? Splashberry launched on July 8, 2026, as part of Dunkin’s second Dunkin’ Zero drop, alongside Watermelon Lime, Heatwave, and Melon Paradise.

Is Splashberry discontinued? No. As of this writing, Splashberry remains part of Dunkin’s Dunkin’ Zero lineup, which had grown to ten total flavors by fall 2026.

What does Splashberry taste like? Watermelon leads the flavor, with a tarter blackberry note underneath. It’s built to taste like a “peak summer” fruit drink rather than the more tropical, golden-hour flavors from Dunkin’s original spring Zero lineup.

How does Dunkin’ Zero caffeine compare to coffee? A medium Dunkin’ Zero contains about 145 mg of caffeine, roughly equivalent to two shots of espresso or a cup and a half of brewed coffee.

Is Splashberry vegan? Yes, in its base recipe. Dunkin’ Zero drinks contain no animal-derived ingredients and are dairy-free by default.

Is Splashberry the same as Watermelon Lime? No. Both are watermelon-based, but Watermelon Lime pairs watermelon with lime for a citrus-forward drink, while Splashberry pairs watermelon with blackberry for a berry-forward finish.

The Verdict

Splashberry is one of the stronger flavors to come out of Dunkin’s July 2026 summer expansion — a clear watermelon-blackberry combination in a batch of flavors that reviewers otherwise found somewhat indistinct. It hasn’t reached Sunzest’s reputation as the best flavor in the full Dunkin’ Zero lineup, but if you like watermelon drinks with a bit of tartness rather than straight sweetness, it’s a solid pick.

Curious how it stacks up against the original spring flavors? Check our Sunzest Dunkin’ Zero guide, or browse the full Dunkin’ Donuts drink menu to see where Zero fits next to coffee, Refreshers, and lattes.