Product Spotlight: Double-Wall Cosmetic Jars

Double Wall Cosmetic Jar Material and Construction

A double-wall jar is constructed with two separate layers of polypropylene plastic - an inner wall that holds the product and an outer wall that gives the jar its visible exterior surface - with a small air gap between them. This construction technique adds real weight and rigidity to the jar without requiring a thicker single wall of plastic, giving the finished product a substantial feel in the hand that a comparable single-wall jar simply can't replicate. The air gap between the walls also provides a small degree of thermal insulation, which can help slow temperature-related softening in balms and creams that are sensitive to heat. Polypropylene itself is a durable, chemical-resistant plastic that holds up well to a wide range of cosmetic formulas, including oil-based creams, exfoliating scrubs, and clay-based masks, without reacting with the active ingredients.

• Two-layer wall construction adds weight and rigidity without thicker single-wall plastic
• Air gap between walls offers mild thermal insulation
• Polypropylene resists reaction with oils, exfoliants, and clay-based formulas

Double Wall Jar Caps and Liners

Double-wall cosmetic jars are available with several lined cap styles to complement the jar's premium construction. Standard PE lined caps use a smooth plastic liner suited to general-purpose creams and balms, while a PS22 lined cap offers a liner material better suited to oil-heavy or more viscous formulas that need an extra layer of leak protection. For a rounder, more finished look, our lined dome cap gives the jar a smooth, continuous curve from body to lid, often preferred for higher-end retail presentation. Black polypropylene jars are similarly available with matching black lined caps in dome, smooth, and ribbed PE finishes, letting a brand keep a consistent black-on-black aesthetic throughout the package.

• White or black PE lined caps for general-purpose sealing
• PS22 lined caps for oil-heavy or viscous formulas
• PE lined dome cap options for a rounder, premium profile

Special Features: Radius vs. Straight-Sided

SKS offers double-wall jars in two distinct body profiles. The straight-sided version has vertical walls from base to shoulder, giving labels a flat, uninterrupted surface to wrap around, which works well for brands with detailed label artwork or fine print that would distort on a curved surface. The radius version has a gently rounded body that tapers slightly from base to shoulder, giving the jar a softer, more organic silhouette that many skincare and spa brands prefer for a less clinical, more approachable look on a retail shelf or in product photography. Both shapes use the same double-wall construction and are available across the same size range, so the choice between them comes down entirely to which silhouette best fits your brand's visual identity rather than any difference in function or durability. Some brands even use both shapes deliberately within the same product line, pairing the straight-sided jar with a hero product that leans on detailed label storytelling, while reserving the radius jar for a more premium or spa-positioned item where the softer shape itself does some of the visual work.

Possible Uses for Double Wall Cosmetic Jars

Double-wall jars are especially popular for face creams, moisturizers, and night treatments, where the jar's premium weight and feel become part of a customer's perceived value of the product itself. Body scrubs, bath salts, and exfoliating treatments also make good use of the wider mouth opening common to both jar profiles, giving customers easy access to scoop out textured or granular formulas. Trial and sample sizes of this jar are frequently used in subscription boxes and gift-with-purchase promotions, where a small jar with a substantial feel helps a sample product still feel like a premium experience rather than an afterthought.

• Face creams, moisturizers, and night treatments
• Body scrubs and exfoliating treatments
• Bath salts and masks
• Trial-size and subscription box inclusions

Sizes and Options in Double Wall Cosmetic Jars

Double-wall cosmetic jars are available in a wide size range, starting at 1/4 oz for sample and trial formats, through 1 oz and 2 oz sizes popular for gift sets, up to 4 oz and 8 oz for full-size retail products. This size range is available across both white and black colorways and in both the straight-sided and radius body profiles, giving brands significant flexibility to build a cohesive product line spanning trial sizes through full-size retail units without switching jar families. Because every size shares the same cap thread and general proportions within its color and shape family, a brand can also test a formula at the smaller 1 oz or 2 oz size before committing to a full production run at 4 oz or 8 oz, without needing to requalify the cap fit or redesign the label footprint.

• 1/4 oz, 1 oz, 2 oz, 4 oz, and 8 oz
• White or black polypropylene
• Straight-sided or radius body profile