Can Oatly Survive Without the Word 'Milk'?
Oatly has built its brand on challenging the dairy industry. But in February, the Swedish plant-based drinks company suffered a significant setback in the UK when the Supreme Court ruled that it could not trademark or use the slogan "Post Milk Generation" in relation to its oat-based products.
The judgement marks the culmination of a long-running legal dispute with Dairy UK and has important implications for how plant-based brands position themselves in regulated food categories.
The dispute began when Oatly sought to trademark the phase "Post Milk Generation" with the UK Intellectual Property Office (IPO). The slogan was officially registered in 2021, but Dairy UK, the trade body representing British dairy farmers, objected - arguing that under trademark and food labelling law the term "milk" can only refer to products derived from animals.
The IPO rejected Oatly's application, describing the use of the word "milk" in this concept as "deceptive".
Oatly successfully appealed the decision in the High Court. However, the Court of Appeal later overturned that ruling, restoring the IPO's original position.
The case ultimately reached the Supreme Court, which unanimously decided that Oatly could neither trademark nor use the slogan in connection with oat-based food and drink.
Why "milk" matters in marketing
The Supreme Court found that the term "milk" was being used to describe a food and drink and that the slogan did not fall within any exception allowing the use of protected terms to describe a "characteristic quality" of a product.
According to the BBC, the court said the phrase "post-milk generation" could confuse consumers about whether Oatly's products were entirely milk-free or merely contained reduced amounts of milk.
Regulations define milk as coming from the dairy sector and specifically from animals.
For marketing teams across the plant-based sector, the ruling reinforced the limits of what is often called "category borrowing" - using the terminology of an established category to help consumers understand a new one.
According to the Telegraph, Richard May, a Partner from the law firm Osborne Clarke, said: "In practical terms, terminology such as 'oat milk' or 'plant-based cheese' now carries heightened legal risk in the UK market.
"Marketing teams will need to ensure that product names and campaign messaging do not stray into protected territory."
Industry reaction and wider implications
Dairy UK welcomed the decision. Its CEO Judith Bryans said the ruling "helps ensure that long-established dairy terms continue to carry clear meaning for consumers". She also described it as bringing "greater certainty for businesses" while allowing appropriate descriptors where the law permits.
Oatly, by contrast, framed the case as anti-competitive. Bryan Carroll, the firm's General Manager for UK and Ireland, said the dispute was "a way to stifle competition and is not in the interests of the British public" and argued that the decision "creates unnecessary confusion and an uneven playing field for plant-based products that solely benefits Big Dairy", according to the BBC.
Similar restrictions apply to terms such as cream, butter, cheese and yoghurt.
A brand reset for plant-based products
From a marketing perspective, the ruling forces a strategic recalibration. Oatly's brand identity has long relied on bold, culturally resonant messaging that positions its consumers as part of a movement.
The inability to use "milk" as a branding device in the UK reduces the rhetorical contrast between dairy and plant-based products. The decision also signals regulatory alignment with the EU where debates continue over the labelling of plant-based alternatives.
For now, the UK Supreme Court has drawn a clear line: in food marketing, "milk" remains reserved for animal products. For Oatly and its competitors, the challenge is no longer whether they can use the word, but how they build brand equity without it.
