10 Reasons Direct-to-Consumer Hair Care Brands Are Adding Solid Products to Their Lines

A few years ago, solid shampoo bars sat on the fringes of the personal care aisle. They were associated with farmers’ markets, zero-waste bloggers, and brands that prioritized mission over mainstream appeal. That perception has changed, perhaps faster than anyone expected.

The global shampoo bar market was valued at roughly $11.3 billion in 2024, and multiple research firms project it will exceed $19 billion by the early 2030s, growing at a compound annual rate of 5.6% to 7.7%, depending on the source. North America currently holds the largest regional share, and online-exclusive solid hair-care variants grew by round 41% between 2023 and 2025. Those numbers are hard to ignore.

For direct-to-consumer companies already selling liquid shampoos, conditioners, and treatments, the question isn’t whether solid formats belong in the portfolio. It’s more a matter of when and how to introduce them without cannibalizing existing revenue. Below, we walk through ten of the most compelling factors pushing these companies toward solid shampoo manufacturing and concentrated, waterless formats.

Reason 1: Lower Shipping Costs and Lighter Fulfillment

Liquid hair care is heavy. Water constitutes 60% to 80% of most conventional shampoos and conditioners, and that weight shows up directly in freight bills. For a DTC company shipping thousands of orders monthly, even small per-unit savings compound quickly.

Solid bars are concentrated. A single bar can replace two or three bottles of liquid shampoo, and they weigh a fraction of the equivalent liquid volume. That translates to lower dimensional weight charges, reduced packaging material, and fewer breakage claims during transit. In our experience working with emerging brands, the shipping cost differential alone can improve per-order margins by 15% to 20%, which is significant for companies operating on thin DTC economics.

Reason 2: Sustainability Messaging That Actually Holds Up

Consumers are paying attention. The beauty industry generates over 120 billion units of packaging annually, and roughly 95% of cosmetic packaging ends up discarded after a single use. Only about 14% of plastic waste even reaches a recycling center.

DTC brands live and die by their story. A brand that can credibly claim it’s eliminating plastic bottles from its supply chain, not just swapping one disposable container for another, builds trust with eco-conscious buyers. Solid bars wrapped in recyclable or compostable paper offer that credibility. They’re not a perfect solution, but they’re a visible one, and that matters when your customer is scrolling through an Instagram feed full of green claims.

That said, brands need to be careful here. The FTC’s Green Guides govern environmental marketing claims, and vague terms like “eco-friendly” or “sustainable” without substantiation can trigger enforcement action. Specificity wins. State exactly what the packaging eliminates and how it does so rather than relying on broad language.

 

Margins, Market Position, and the Race to Stand Out

Reason 3: Stronger Gross Margins on Concentrated Formats

Here is where the math gets interesting for brand founders. Liquid products carry the cost of water, heavier packaging, larger storage footprints, and higher shipping weights. Remove the water, and you strip away a surprising amount of cost from the supply chain.

Solid bars typically require less packaging material. A paper wrap or a small cardboard box replaces a plastic bottle, a pump, and a shrink sleeve. The raw material cost per unit of active benefit (the surfactants, conditioning agents, and botanicals that do the actual work) is often comparable to or even lower in solid formats, because you’re not paying to ship and store water. For brands already selling at a premium price point, the margin improvement can be substantial.

Factor	Liquid Shampoo	Solid Shampoo Bar
Water content	60%–80%	Under 5%
Typical package weight (per wash equivalent)	Higher	50%–70% lighter
Primary packaging	Plastic bottle + pump	Paper wrap or cardboard
Average shelf life	12–24 months	18–36 months
Breakage risk in shipping	Moderate (leaks, cracks)	Very low
Storage footprint per unit	Larger	Significantly smaller

Reason 4: Product Line Expansion Without Massive Capital Outlay

Launching a new liquid SKU often requires sourcing new bottles, designing new labels, adjusting filling-line parameters, and managing minimum order quantities across multiple components. It adds up.

Adding a solid format to an existing line can be simpler, particularly when working with a contract manufacturer specializing in extruded bars. The tooling requirements differ from liquid production, but the formulation process can move faster in some cases because you’re working with fewer variables. You don’t need to worry about preservative systems the same way you do with water-based products, which simplifies stability testing timelines.

For a DTC brand with a loyal audience for its liquid line, a solid version of a bestselling scent or formulation is a natural extension. It’s a way to give customers something new without building an entirely separate brand architecture.

Reason 5: The Travel and Hospitality Channel Opens Up

Solid bars are inherently travel-friendly. No TSA liquid restrictions, no risk of spills inside a suitcase, no bulky bottles taking up valuable luggage space. That practical advantage resonates with frequent travelers, but it also opens a secondary revenue channel that many DTC brands overlook: hospitality.

Hotels and boutique lodging companies are increasingly replacing single-use mini bottles with guest amenity bars. Several states and municipalities have enacted legislation restricting single-use plastic toiletry bottles in lodging, and the trend is accelerating. A DTC brand with an existing solid product line can pitch those same formulations to hotel purchasing managers, creating a B2B revenue stream that supplements its consumer business.

 

Consumer Behavior Is Pulling Brands in This Direction

Reason 6: Younger Buyers Expect Waterless and Waste-Conscious Options

Gen Z and millennial shoppers are not just tolerant of solid formats; many actively seek them out. Research consistently shows that 52% to 64% of younger consumers consider the environmental impact of packaging when choosing personal care items. The clean beauty movement, which started with ingredient transparency, has expanded to include packaging and production methods.

DTC companies succeed when they listen to their customers, and right now, those customers are asking for less plastic, fewer chemicals, and more thoughtful formulation. Natural ingredients, plant-based surfactants, and minimal processing resonate with this audience. Solid formats allow multiple boxes to be checked simultaneously, making them an efficient answer to multiple consumer demands at once.

It’s worth noting that consumer demand for solid hair care isn’t limited to environmental motivations. Many buyers simply prefer the experience: the tactile quality of using a bar, the absence of pump bottles cluttering a shower shelf, the satisfaction of watching a product last longer than expected.

Reason 7: Subscription and Refill Models Pair Naturally With Bars

The subscription economy has been central to DTC growth for years. Dollar Shave Club proved the model; beauty brands adopted it aggressively. But subscriptions work best when the product has a predictable usage cycle and when the physical logistics of replenishment are straightforward.

Solid bars fit both criteria. A bar lasts a predictable number of washes, making it easy to estimate when to replace it. The small, lightweight format keeps subscription shipping costs low. And because bars don’t leak or degrade as quickly as liquids do, there’s less risk that a customer will receive a damaged or degraded product, which reduces returns and improves lifetime value.

Some brands are pairing solid bars with reusable tins or travel cases, creating a refill loop that reinforces loyalty. The customer buys the container once, then reorders the bar on a recurring schedule. It’s a clean model, both logistically and environmentally.

 

Regulatory and Operational Advantages Worth Considering

Reason 8: Simplified Preservation and Stability

Water is a breeding ground for microbial growth, which is why liquid personal care products require robust preservative systems. The formulation must pass challenge testing, the packaging must maintain a sealed environment, and the shelf life clock starts ticking on the day of manufacture.

Solid formats with minimal or no water content sidestep much of that complexity. The microbial risk drops significantly, potentially reducing the need for certain preservatives. This matters for brands marketing “clean” or “free-from” formulations, because it’s genuinely easier to create a shorter, simpler ingredient list in a solid format than in a water-based one.

From a regulatory perspective, all cosmetic products sold in the United States are subject to FDA oversight under the Federal Food, Drug, and Cosmetic Act, as amended by the Modernization of Cosmetics Regulation Act of 2022 (MoCRA). MoCRA introduced new requirements for facility registration, product listing, adverse event reporting, and labeling. Brands working with a registered private-label manufacturer benefit from a production partner that already maintains compliance infrastructure.

One important clarification: solid bars that are marketed solely for cleansing may qualify under the FDA’s soap exemption, which applies to products made primarily from alkali salts of fatty acids and marketed only for cleaning. However, if a product makes cosmetic or therapeutic claims, such as moisturizing, volumizing, or treating dandruff, it’s regulated as a cosmetic or, if it contains an active ingredient, as a potentially over-the-counter drug, regardless of its physical format. Brands should work closely with their formulator and legal counsel to correctly classify each SKU.

Reason 9: Scalability Through Contract Manufacturing

The biggest barrier for DTC brands considering solid formats is the assumption that they need to invest in entirely new production equipment. In reality, established contract manufacturers offer turnkey solutions.

A brand can bring a custom formulation to a manufacturer or work from an existing base, adjusting scent, color, and active ingredients through a private-label or white-label approach. Private label means the formulation is developed exclusively for one brand. White label, by contrast, involves a pre-existing formula rebranded under the client’s name. Both paths allow a DTC company to enter the solid category without the capital expenditure required to build manufacturing in-house.

Production methods vary depending on the desired bar type. Extrusion works well for syndet (synthetic detergent) bars and solid shampoos, producing consistent, dense bars at scale. Hot pour methods suit formulations that require melting and molding, often for conditioning bars or multi-phase products. Understanding which process fits your formulation goals is part of the discovery conversation with any qualified manufacturer.

 

Looking Ahead: The Broader Industry Context

Reason 10: The Competitive Landscape Is Moving Quickly

Major players are already here. L’Oreal launched Garnier’s Whole Blends shampoo bars in the U.S. market, featuring plant-based ingredients. Procter & Gamble spent over a decade developing Gemz, a waterless, single-dose haircare format. Lush has been selling solid shampoo bars for more than two decades. Ethique, a certified B Corp from New Zealand, built its entire business around solid beauty products and has scaled globally.

When legacy companies and well-funded startups converge on a category, it signals that the opportunity is real. For mid-size DTC brands sitting on the sidelines, every quarter of delay means competitors are building consumer awareness, claiming search visibility, and locking in retail shelf space.

The DTC model itself offers an advantage here: speed. A direct-to-consumer brand with an existing audience can test a solid SKU, gather feedback, iterate on the formula, and scale up faster than a brand navigating traditional retail buying cycles. But that speed advantage only matters if you act on it.

 

Frequently Asked Questions

What is trending in the hair industry?

Scalp wellness and holistic hair health have become central themes in 2025 and into 2026. Prestige sales of serums and treatments grew significantly across North America and Europe, reflecting a broader view of hair care as self-care. Waterless and concentrated formats are gaining mainstream traction, with major corporations investing in single-dose and solid alternatives to conventional bottles. Personalization remains a strong driver too, as consumers expect formulations tailored to their specific hair type, porosity, and styling habits rather than one-size-fits-all solutions from mass-market shelves.

What are the golden rules of hair care?

Start with understanding your hair type and its unique needs before choosing any routine. Gentle cleansing that removes buildup without stripping essential oils preserves long-term strand integrity. Consistent conditioning, whether with a standalone conditioner or a two-in-one conditioning bar, helps maintain moisture balance and reduce breakage. Limit heat exposure when possible, and protect strands from UV and environmental stressors. Finally, read ingredient labels carefully; fewer synthetic additives often mean less cumulative irritation for both your scalp and the broader ecosystem your rinse water enters.

What is the biggest problem for the beauty industry?

Packaging waste remains the most pressing operational and environmental challenge. The sector produces over 120 billion units of packaging each year, and an estimated 95% is thrown away after a single use. Regulatory frameworks are tightening in response. The EU’s Packaging and Packaging Waste Regulation sets binding mandates for recyclability, and MoCRA in the U.S. is expanding FDA oversight of cosmetic safety and manufacturing practices. Brands that fail to address waste reduction risk both regulatory penalties and consumer backlash, particularly among younger demographics who view purchasing decisions as ethical statements.

What are the benefits of hair care products?

Quality hair care formulations protect and restore the protein structure of each strand, reducing splitting and breakage over time. Properly formulated cleansers remove dirt, oil, and styling buildup without compromising the scalp’s protective barrier. Conditioning agents seal the cuticle layer, improving shine and manageability while reducing friction during detangling. Beyond functional performance, consistent hair care routines contribute to emotional well-being; the ritual of caring for your hair can serve as a grounding daily practice, which is why the wellness-beauty crossover continues to gain global consumer momentum.

 

Ready to Add Solid Formats to Your Product Line?

MidSolid Press & Pour partners with DTC brands at every stage, from initial formulation through full-scale production. Whether you’re exploring solid conditioner manufacturing for the first time or ready to scale an existing bar formula across new SKUs, our team brings the production expertise and regulatory knowledge to move your project forward efficiently. Reach out to start a conversation about your goals, timelines, and volume requirements.