The Federal Circuit reversal in the Sunkist v. KIST case is one of those trademark decisions that sounds like it was drafted after someone opened a refrigerator, stared at a row of sodas, and thought, “Surely this cannot become federal appellate law.” And yet here we are: kisses, sunlight, soft drinks, and a serious reminder that in trademark law, one small syllable can create a very large legal headache.
On July 23, 2025, the U.S. Court of Appeals for the Federal Circuit reversed a Trademark Trial and Appeal Board decision that had dismissed Sunkist Growers, Inc.’s opposition to Intrastate Distributors, Inc.’s applications to register KIST for soft drinks. The court concluded that the KIST marks were likely to cause confusion with Sunkist’s longstanding SUNKIST marks when used for beverages. In plain English: the appeals court thought consumers could reasonably see KIST soda and wonder whether it came from, was licensed by, or was somehow connected to SUNKIST.
This decision matters far beyond orange soda. It gives brand owners, trademark attorneys, beverage companies, startups, and anyone naming a product a practical lesson in how courts analyze likelihood of confusion, commercial impression, and evidence under the DuPont factors. It also proves that “but our label has lips on it” is not always the legal force field a company hopes it will be.
Quick Background: SUNKIST, KIST, and a Fizzy Trademark Fight
Sunkist Growers is no newcomer to the marketplace. The SUNKIST brand has been associated with citrus and beverage products for generations, including citrus-flavored soft drinks sold directly or through licensees. The company owns multiple federal trademark registrations for SUNKIST, including standard character marks and design marks.
Intrastate Distributors, Inc., often referred to as IDI in the case, is a bottling company that acquired the KIST brand in 2009. KIST had a history as a vintage soda brand, and IDI used it with soda and later with glass-bottled nostalgia sodas and sparkling water products. In October 2019, IDI filed applications to register KIST in standard characters and in a stylized block-letter form for soft drinks, sodas, sparkling water, concentrates, and syrups for making soft drinks.
Sunkist opposed those applications before the TTAB, arguing that KIST was too close to SUNKIST for related beverage products. The opposition centered on Section 2(d) of the Lanham Act, which allows refusal of a trademark registration when the applied-for mark is likely to cause confusion with a prior registered mark.
What the TTAB Originally Decided
The Trademark Trial and Appeal Board first sided with IDI. In its 2023 decision, the TTAB found that several factors favored Sunkist. The goods were closely related, the trade channels overlapped, the purchasing conditions involved ordinary consumer care, and the SUNKIST mark had commercial strength.
That sounds like a pretty good day for Sunkist, right? Four important factors in its favor. But the TTAB ultimately found no likelihood of confusion because it gave heavy weight to two points: the similarity of the marks and the lack of actual confusion evidence.
The Board reasoned that SUNKIST and KIST created different commercial impressions. According to the TTAB, SUNKIST suggested the sun, while KIST suggested a kiss. The Board also noted that Sunkist had not shown reported examples of actual marketplace confusion, despite the marks having coexisted for some time.
In short, the Board treated the “sun” versus “kiss” distinction as powerful enough to overcome the other factors. But on appeal, the Federal Circuit was not persuaded. The court essentially said: nice theory, but where is the evidence?
Why the Federal Circuit Reversed the TTAB
The Federal Circuit reversed because it found that the TTAB’s analysis of the similarity of the marks was not supported by substantial evidence. This is the heart of the Sunkist v. KIST trademark case.
1. The Lips Image Was Not the Mark
The TTAB leaned on the idea that KIST evoked a kiss, partly because some marketing materials showed lips near the KIST wording. The Federal Circuit found this reasoning too thin. The lips image was not part of the applied-for KIST trademark. The applications were for the word KIST in standard characters and a stylized form, not for a combined word-and-lips design.
That distinction matters. Trademark comparison usually focuses on the mark as applied for or registered, not on every possible decorative element that may appear near it in marketing materials. A brand cannot always escape confusion by saying, “Look, we sometimes put a cute graphic nearby.” If the graphic is not part of the trademark application, it may not carry the legal weight the applicant wants.
2. Consumers Were Not Clearly Exposed to the “Kiss” Theme
The court also noted that there was not enough evidence showing that consumers actually encountered KIST with the lips image or understood the mark as referencing a kiss. Some materials may have been directed to distributors or retail buyers, not necessarily ordinary consumers walking down the soda aisle.
That is a practical but powerful point. Trademark law cares about consumer perception. A clever internal brand story, sales deck, or distributor-facing marketing theme does not automatically define how ordinary buyers perceive a mark. If shoppers see KIST on a bottle, they may simply hear or read a word that is very close to the second syllable of SUNKIST.
3. The TTAB Over-Relied on SUNKIST’s Sun Design
The Federal Circuit also found that the Board placed too much emphasis on Sunkist design marks featuring a sun. Sunkist owned and used standard character SUNKIST marks as well. A standard character mark protects the wording itself, regardless of font, style, size, or design.
This is a major trademark lesson. When a company owns a word mark, the analysis does not stop at one particular logo version. SUNKIST is not legally limited to appearing with a sun design, just as KIST was not legally limited to appearing with lips. Courts must compare the relevant marks in a way that reflects the scope of the registrations and applications.
The DuPont Factors: Why They Mattered Here
The Federal Circuit’s decision is grounded in the familiar DuPont factors, the multi-factor framework used by the USPTO and TTAB to evaluate likelihood of confusion. Not every factor is relevant in every case, and no single factor automatically controls. However, two factors often play starring roles: the similarity of the marks and the relatedness of the goods.
In this case, the relatedness of the goods was straightforward. Both parties were dealing with soft drinks or closely related beverage products. The trade channels were presumed to overlap, and the goods could be purchased by ordinary consumers exercising ordinary care. Nobody buys a soda with the same level of caution used to buy a house, a diamond, or a suspiciously discounted “luxury” watch from a folding table.
The strength of the SUNKIST mark also favored Sunkist. A strong mark generally receives broader protection, especially where the junior mark is used on closely related goods. The closer the products, the less distance a newcomer may have to travel before it bumps into the senior brand’s trademark rights.
Once the Federal Circuit rejected the TTAB’s finding that the marks created distinct commercial impressions, the balance changed dramatically. With several factors already favoring confusion, and with the similarity analysis no longer helping IDI, the lack of actual confusion evidence was not enough to save the KIST applications.
No Actual Confusion? Still Not a Free Pass
One of the most useful parts of the Federal Circuit’s opinion is its treatment of actual confusion. Sunkist apparently did not prove specific instances of consumers confusing KIST with SUNKIST. The TTAB weighed that against Sunkist. The Federal Circuit, however, emphasized that failure to prove actual confusion is not dispositive because actual confusion is often hard to prove.
This is a common misunderstanding in trademark disputes. A trademark owner does not need to produce a shopper who says, “I personally bought the wrong soda and my afternoon was ruined.” Actual confusion can be useful evidence, but the legal standard is likelihood of confusion, not documented confusion. Courts ask whether confusion is probable under the circumstances, not whether someone has already sent an angry email to customer service.
For brand owners, this is reassuring. If you discover a potentially confusing mark before massive consumer confusion occurs, you may still have a valid opposition. For applicants, it is a warning: “Nobody has complained yet” is not the same as “our mark is safe.” Silence can mean many things. Maybe confusion has not happened. Maybe it happened but was not reported. Maybe consumers shrugged and drank the soda anyway.
Commercial Impression: The “Vibe” Must Be Proved
Trademark lawyers often talk about commercial impression, which means the overall idea, memory, or marketplace impression created by a mark. It is not just spelling. It is not just sound. It is the combined effect of appearance, pronunciation, meaning, and consumer perception.
The TTAB believed KIST and SUNKIST created different commercial impressions because one suggested a kiss and the other suggested sunlight. The Federal Circuit did not reject the concept of commercial impression. Instead, it rejected the lack of evidence supporting that conclusion on this record.
That distinction is important. A commercial impression argument can work, but it needs proof. If a company claims its mark suggests romance, freshness, speed, luxury, rebellion, nostalgia, or anything else, it should be ready to show how consumers actually encounter and understand that message. Packaging, advertising, survey evidence, marketplace context, and consistent branding can all matter.
Here, the court found that the record did not adequately support the idea that KIST consistently presented a kiss-focused commercial impression. Meanwhile, SUNKIST’s protection was not limited to sun-themed logo presentations. The result was a closer comparison between the words themselves: KIST and SUNKIST.
Why KIST and SUNKIST Were Considered Too Close
From a consumer’s perspective, KIST is fully contained within SUNKIST. The two marks share the same ending sound and similar spelling. In the beverage aisle, where purchasing decisions can be quick and casual, that overlap can matter. Consumers may not pause to conduct a courtroom-level phonetic analysis while reaching for a cold drink.
The Federal Circuit’s decision does not mean every short word hidden inside a longer brand name creates confusion. Context matters. Goods, channels, consumer care, mark strength, and marketplace evidence all affect the outcome. But when a strong senior mark and a junior mark appear on closely related products, even modest similarity can become legally significant.
This is especially true in the beverage industry, where licensing is common. Consumers know that major beverage brands often extend into different flavors, formats, packaging styles, and product lines. If a shopper sees KIST sparkling water near SUNKIST soda, the shopper might assume a relationship, especially if the marks sound similar and appear on related goods.
What This Means for Beverage Brands
The Federal Circuit’s Sunkist v. KIST ruling is particularly relevant for beverage companies because drinks often live in crowded trademark territory. The industry loves short, punchy names. It also loves nostalgia, fruit references, flavor cues, playful spelling, and bright packaging. That creates a naming minefield with bubbles.
Before launching a new soda, sparkling water, juice, energy drink, or concentrate, companies should conduct serious trademark clearance. A basic internet search is not enough. Businesses need to review federal registrations, pending applications, common-law uses, related goods, phonetic equivalents, foreign-language meanings when relevant, and brand families.
The case also highlights the risks of reviving vintage brands. Old marks may feel charming and available, but trademark rights can be messy. A cancelled registration does not automatically solve modern confusion problems. If the revived mark sits too close to a strong existing brand in the same product category, nostalgia will not necessarily rescue it. The law may admire history, but it does not let history cut the line at the trademark office.
Lessons for Trademark Applicants
Choose a Mark That Creates Real Distance
If your product will compete in the same category as a famous or commercially strong brand, do not rely on tiny differences. Dropping a syllable, changing a vowel, or adding a design element may not be enough. The safer route is to choose a name that creates clear visual, phonetic, and conceptual distance.
Do Not Depend on Packaging Alone
Packaging can help shape consumer perception, but the trademark application matters. If the applied-for mark is a word mark, the comparison may focus heavily on the words themselves. A decorative label element may be irrelevant if it is not part of the mark as filed.
Build Evidence, Not Just Arguments
Trademark disputes reward evidence. If you want to argue that consumers understand your brand in a particular way, show consistent consumer-facing use. Distributor materials, isolated graphics, or clever explanations from litigation briefs may not be enough.
Remember That Actual Confusion Is Not Required
Do not assume that a lack of complaints means a mark is registrable. Trademark law is preventive. The goal is to avoid likely confusion before the marketplace turns into a guessing game.
Lessons for Trademark Owners
For owners of established marks, the decision reinforces the value of consistent trademark policing. Sunkist opposed the KIST applications when they were published, preserved its rights, and appealed after losing at the TTAB. That persistence mattered.
The case also shows why standard character registrations are powerful. A logo may evolve, but a standard character word mark protects the wording across many presentations. Brand owners should consider whether their trademark portfolios include both word marks and design marks where appropriate.
Finally, Sunkist v. KIST reminds senior users to document brand strength. Long use, licensing programs, registrations, sales, advertising, and marketplace recognition can all help show that a mark deserves meaningful protection. A strong trademark portfolio is not built when litigation starts; it is built years before anyone needs it.
Practical Experience: What Brand Teams Can Learn from Sunkist v. KIST
In real-world brand clearance, the most dangerous names are often the ones that feel “almost different enough.” A team may fall in love with a short, catchy mark because it looks good on a can, sounds fun in a pitch meeting, and leaves plenty of room for a logo. The problem is that trademark law does not grade names on charm. It asks whether ordinary consumers are likely to believe the goods come from the same source, are affiliated, or are sponsored by the same company.
The Sunkist v. KIST case feels familiar because brand teams frequently rely on context that may not matter as much as they expect. Someone may say, “Our logo is totally different,” “Our brand story is different,” or “Our packaging has a different mood.” Those details can help, but they do not erase the similarity between the core words. If the trademark application is for the word itself, the word has to carry the legal burden. In this case, KIST had to stand next to SUNKIST in the same beverage universe, and the Federal Circuit found the distance too narrow.
Another practical lesson is that internal intent is not the same as consumer perception. A company may intend KIST to feel nostalgic, romantic, playful, or kiss-themed. But if shoppers do not clearly receive that message, the argument becomes fragile. Evidence should be gathered before a dispute begins: product photos, advertisements, consumer-facing campaigns, website screenshots, retail displays, survey data, and examples of how customers actually talk about the product. A brand story that exists only in a presentation deck is like carbonation left overnight: technically present once, but not very persuasive later.
For startups and smaller companies, the decision is a reminder to budget for trademark clearance early. It is far cheaper to change a name before filing, printing labels, pitching retailers, and building inventory. Once a product is in bottles, boxes, menus, ads, and distributor catalogs, a trademark problem becomes expensive and emotionally painful. Nobody wants to tell the sales team that the beloved product name may need to be retired because it wandered too close to a famous neighbor.
For established brand owners, the experience is different but equally important. Monitoring new applications, opposing problematic marks, and maintaining clean registrations can protect decades of goodwill. Sunkist’s ability to rely on long-standing SUNKIST registrations and beverage-related use helped frame the dispute. The case shows that trademark enforcement is not merely aggressive legal housekeeping; it is brand maintenance. If a company allows similar marks to accumulate in related categories, its brand distinctiveness may weaken over time.
The biggest experiential takeaway is simple: names do not live alone. They live on shelves, in search results, in distributor catalogs, in customer memory, and beside competing products. A mark that seems cute in isolation may become risky when placed next to an older, stronger mark in the same category. Sunkist v. KIST teaches that the best trademark strategy is not to win a clever argument after the fact. It is to choose a mark that does not need one.
Conclusion
The Federal Circuit reversal of the TTAB in Sunkist v. KIST is a useful, practical, and surprisingly flavorful trademark decision. The court held that the TTAB’s conclusion about different commercial impressions was not supported by substantial evidence. It found that the Board relied too heavily on a lips image associated with KIST and a sun design associated with SUNKIST, even though the relevant marks included word marks that were not limited to those design elements.
The decision also confirms that a lack of actual confusion does not automatically defeat a likelihood-of-confusion claim. When goods are closely related, channels overlap, consumers exercise ordinary care, and a senior mark is strong, an applicant needs more than a clever branding explanation to avoid conflict.
For businesses, the message is direct: choose trademarks with meaningful distance, support commercial-impression arguments with evidence, and never assume that small spelling changes will keep a brand out of trouble. In the beverage aisle, as in trademark law, bubbles rise quicklyand so do disputes.
Note: This article is an informational analysis for publishers, marketers, and brand owners. It is not legal advice and should not replace guidance from a qualified trademark attorney.
