How to Choose Packaging Materials for Skincare: A Founder Guide

Start From the Formula, Not the Mood Board

Before you look at a single sample bottle, write down five things about your formula. They eliminate most of the catalogue for you.

• **Viscosity.** A thin essence, a lotion, a thick cream and a balm need different dispensing. Pumps have a viscosity ceiling; past it they stall or deliver inconsistent doses. Thick formulas belong in jars, tubes or airless systems with a wide piston.
• **Water content.** Anhydrous products (oils, balms) are microbiologically low-risk and tolerate open packs. Water-containing products need a preservative system, and the pack either helps that system or works against it.
• **pH.** Low-pH formulas, acid toners and exfoliants interact with some metals and some liners. Tell your supplier the pH in writing.
• **Fragrance and solvent load.** Essential oils, perfume oils and alcohol are the most aggressive things you can put in a plastic bottle. They are the usual cause of cracking, hazing and swelling.
• **Light sensitivity.** Retinoids, vitamin C and many botanical extracts degrade in light. Clear glass looks beautiful and may be the wrong answer.

Write those five lines at the top of your packaging brief. Then add the two commercial constraints: what format your customer expects at your price point, and how the product will ship. Heavy glass sold online costs more to send and breaks more often; that is a business decision, not a design one.

Founders working on their first **private label skincare** range often find this exercise cuts their shortlist from twenty options to three — which is the point.

The Main Plastics, in Plain English

Plastic covers almost all skincare, and the differences matter.

**PET / PETG.** Glossy, glass-like clarity, good barrier for water-based products, lightweight and hard to break. The default for toners, essences and serum bottles. Less resistant to strong solvents and some essential oils, and less tolerant of hot-fill. PETG is the softer, more mouldable cousin used for shaped bottles.

**PP (polypropylene).** The workhorse. Excellent chemical resistance, takes heat well, used for caps, pump housings, jars and tubes. Naturally slightly cloudy rather than crystal clear, which some founders dislike until they see a well-finished matte PP jar.

**HDPE.** Opaque, tough, very good chemical resistance, inexpensive. Standard for cleansers, body products and anything where clarity does not sell. Squeezes poorly compared with LDPE.

**LDPE.** Soft and squeezable, the usual tube and dropper-bulb material. Lower barrier than HDPE, so not ideal for long shelf life with volatile ingredients.

**Acrylic (PMMA) and SAN.** The thick-walled, luxurious-looking jars and bottles. Visually premium and genuinely heavy in the hand. The catch: acrylic is brittle and chemically sensitive, and it crazes when it meets fragrance or alcohol. It is almost always used as an outer shell around an inner PP container — confirm your formula only ever touches the inner.

**PCR (post-consumer recycled).** Available in PET, HDPE and PP. Colour consistency varies between batches and the surface can be less perfect, so set realistic expectations and ask for production samples rather than golden samples.

Ask one question of every material: has this exact resin been run with a formula like mine? An experienced supplier will know.

Glass, Aluminium and the Alternatives

**Glass.** Chemically inert, so almost nothing in your formula will attack it, and it reads premium without any finishing. Amber and cobalt glass block part of the light spectrum, which helps sensitive actives. The costs are real: weight, breakage in transit, higher freight, and a heavier carbon footprint in shipping even though the material itself recycles well. Glass also needs a liner or a well-matched closure, because the seal is where glass packs leak.

Where glass earns its place: serums, facial oils, dropper bottles, and any product where the perceived value supports the cost.

**Aluminium.** Light, fully opaque, strong barrier, widely recycled. Needs an internal lacquer because many cosmetic formulas react with bare aluminium — always ask which lining is used and whether it has been tested with a formula like yours. Used for tins, tubes and increasingly for refillable bottle shells.

**Monomaterial and refill systems.** A jar with a replaceable inner pod, or a bottle designed to be refilled from a pouch. Genuinely reduces material over a customer's lifetime and gives you a repeat-purchase mechanic. The trade-off is a more complicated first purchase, more components to manage, and a customer behaviour you have to teach.

**Paper-based and bio-based materials.** Improving quickly, but barrier performance and moisture sensitivity still limit them for wet formulas. Fine for secondary cartons, soap wraps and sticks; approach with testing for anything water-containing.

Whatever you choose, test it filled with your own formula. Material datasheets describe the material, not your product inside it.

Closures, Pumps and the Parts Nobody Specifies

Founders specify the bottle and leave the closure to the supplier. Then the product leaks, or the pump dies in month four.

**Pumps.** Check three things: the dose per stroke, the viscosity range it is rated for, and the material of the dip tube and gasket. A lotion pump and a soap pump look similar and are not interchangeable. Ask for the dose specification in millilitres and test it on your actual formula, because a dose that is generous on a thin lotion is stingy on a thick one.

**Airless systems.** **Airless pump bottles** use a piston or a collapsible pouch so the formula never meets air, which protects sensitive actives and can reduce preservative stress. They dispense nearly all the contents and feel premium. The trade-offs: higher component cost, a viscosity window outside which they stall, and a sealed system you cannot inspect once filled. They are an excellent answer for vitamin C and retinoid products and an expensive one for a basic lotion.

**Droppers.** Specify the bulb material (rubber bulbs react with some formulas), the pipette length relative to the bottle, and whether the pipette is glass or plastic. Short pipettes leave product behind and generate complaints.

**Liners and torque.** The seal is a system: closure, liner material, and the torque it is applied at. Under-torqued caps leak; over-torqued caps crack necks and strip threads. Ask your filler for the torque specification and have it recorded in the batch documentation.

**Tube details.** Wall thickness, shoulder type, orifice diameter, and seal type (straight, saddle or star). The orifice is worth real attention — it governs how much product comes out, which shapes both experience and consumption rate.

Decoration and Finishing: What Each Material Allows

The material you chose has already narrowed how the pack can look. Better to know now than after artwork is approved.

**Screen printing.** Durable, good for one to three colours, survives bathroom humidity well. Economical and the safest default for a first range. Fine detail and photographic imagery are not its strength.

**Labels.** The cheapest way to look good and the easiest to change between variants, which matters when you have several scents. Choose the facestock and adhesive for a wet environment; a paper label with weak adhesive will curl within weeks. Clear BOPP labels on clear bottles give a no-label look that reads expensive.

**Shrink sleeves.** Full-body coverage, photographic printing, and they hide seams. They cost more, add a step, and are harder to recycle because the sleeve must be separated.

**Hot stamping and metallised finishes.** Genuine premium cues. They add a process, a reject rate, and lead-time sensitivity. Use them as an accent rather than across the whole pack on a first launch.

**Frosting, matte coating and soft-touch.** Transform a plain bottle. Soft-touch coating feels wonderful and marks easily with oils, so consider where the product will sit in a bathroom.

Two practical rules. First, leave space in the artwork for mandatory information — ingredients in INCI order, net content, batch code, responsible-party details, and a shelf-life or period-after-opening mark. Designers routinely deliver layouts with nowhere to put any of it. Second, settle one decoration system across the range so the family looks related. This is **brand building** at the level customers actually perceive, and it is cheaper than redesigning later. The same logic extends if you later add a **makeup OEM** line: shared finishes make two categories look like one brand.

Cost, Minimums and a Decision Checklist

Packaging is where first-time budgets break, usually because of the components nobody counted.

**What actually drives your packaging cost:**

• **Stock versus custom moulds.** Stock components are available now with no tooling investment. A custom mould gives you a shape nobody else has and carries tooling cost, a development period and its own minimum quantities. For a first launch, stock components with distinctive decoration almost always wins.
• **Component count.** A bottle, pump, overcap, label, shrink band and carton is six items to buy, store and inspect. Each has its own minimum order and its own chance of arriving late.
• **Minimums.** Product MOQ for private label work is typically 1,000 units per SKU, counted per variant. Packaging components usually carry their own separate minimums, which may not line up with your product quantity — ask about both before you commit to a range size.
• **Freight and weight.** Glass and thick-walled acrylic cost more to ship for the whole life of the product, not just once.
• **Waste.** Order a surplus of labels and cartons; they are consumed by setup and rejects.

Pricing depends on the format, the finish and the quantity, and is confirmed when quoting.

**Before you approve anything, confirm:**

• Compatibility testing was run in this exact pack with your formula.
• The pump dose has been tested on your viscosity.
• The artwork fits the mandatory information for your destination market.
• The decoration method survives a wet thumb.
• A filled, cartoned unit has passed a shipping or drop test.
• You know the lead time and minimum for every single component.

Founders ready to **start your own brand** often want this stage to be the fun part. It can be — once the formula has told you what it will tolerate.