Small Plastic Makeup Containers

Hair mask and body butter at 200 g, lip scrub at 50 g. If your product packs under 15 ml, a jar is the wrong format and we quote a tube or an airless pen instead.

Body diameter is measured across the outside wall. Height is measured with the cap on, from the base to the top of the cap. Ask for the drawing if you need body-only height for a filling line; the difference is 13 to 18 mm depending on size.

Fill line sits 4 to 6 mm below the thread start. Above that line the product is pushed into the thread on the first closure and wicks down under the cap for the rest of the shelf life. Thin balms and oil-heavy scrubs reach the thread first, a stiff cream rarely does.

Jars are quoted in grams, cavities are measured in millilitres, and on a thick-wall body the two do not line up one to one. Ask for the water capacity if your fill volume is set in ml.

PET is a good host for most makeup and a poor one for three ingredient families. All three are common in colour cosmetics.

Esters. Isopropyl myristate, caprylic/capric triglyceride and similar esters are what make a pigment glide instead of drag. Above roughly 15% of the formula they soften PET over weeks of contact. The first sign is not a leak. It is haze spreading from the gate in the centre of the base, visible only when the jar is empty.

Limonene. Citrus fragrance is a stress-cracking agent for PET. A citrus lip scrub is the worst case on this page, because sugar crystals press into the base corner while limonene attacks the same point.

Alcohol. Past roughly 20% ethanol, PET can crack at the thread root, where the mould leaves the highest residual stress. The crack runs down from the first thread and appears after filling, not before.

The cap has its own limit. ABS is attacked by ketones and esters: a cap skirt held against a strong solvent formula goes white and can craze at the thread. Where the formula is ester-heavy, ask for a PP cap instead.

We test before tooling. Send 200 g of formula, we fill sample jars and hold them at 40 °C and 75% RH for 12 weeks plus three freeze-thaw cycles, then report haze, torque retention and gasket condition. Where a formula fails, the usual fix is a PP inner cup inside the PET body: the formula touches PP and the shelf still sees PET.

Clarity is a finish choice, not a material claim. Three versions ship from the same mould and at the same MOQ.

Clear. PET as moulded, about 90% light transmission through a 1 mm wall. The pigment reads true and the fill level is visible, which is what a colour buyer wants on a shelf. The thick base throws a slight amber cast; that is the material, not contamination.

Frosted. The outside is etched or coated, so colour scatters and a red reads pink through the wall. Good for skincare that wants a premium hand-feel, wrong for a shade-matching range.

Opaque. Spray coated black, white or any Pantone. It blocks light, which matters for a formula with vitamin C, retinol or a photosensitive pigment. The coating sits on the outside only, the inside is still PET, so the compatibility notes above still apply.

Safety paperwork is three documents, not one certificate. FDA does not certify cosmetic packaging and the EU has no separate packaging standard, so a jar sold as FDA certified is mislabelled.

 

Document	Covers	What it is not
21 CFR 177.1630 declaration	The PET resin grade	Not an FDA certificate
REACH Article 33 statement	SVHC above 0.1% by weight, per batch	Not a REACH approval
94/62/EC heavy metal statement	Pb, Cd, Hg and Cr(VI) at or below 100 mg/kg total	Not a food-contact permit
1935/2004 and 10/2011	Only where food contact is claimed	Not required for cosmetics

 

PET contains no BPA and needs no plasticiser, so there is no phthalate to declare. That is a property of the resin, not an additive we left out.

 

Three liners, three failure points, and none of them is simply a leak.

PE gasket. A flat disc that sits in the cap and seals against the rim land. It forgives an out-of-round rim better than anything else, which is why it is the standard on this range. Its weakness is compression set: the foam seals on the first closure and less well after twenty. ASTM D395 method B, 22 h at 70 °C, should come back at 25% or less.

PP plug-seal disc. A short skirt pushes into the bore and seals against the bore wall rather than the rim. It re-closes indefinitely and needs no adhesive, which suits a jar the customer opens daily. It fails when the bore is out of round, and it fails when the cap is over-torqued, because the skirt buckles outward and breaks its own seal.

Induction foil. The only hermetic option, and the only one that gives tamper evidence on a jar. It needs a flat, clean rim and a sealer on your filling line. On the 200 g body the foil also stiffens the rim against a panel drop.

Most leaks on a wide-mouth jar are a fill-height problem, not a liner problem. Keep the fill line 4 to 6 mm below the thread and the liner has little to do.

Torque is set by the liner, not by the cap diameter. A PE gasket has to be compressed before it seals: 15 to 22 in-lb on the 65 to 78 mm bodies, 20 to 28 in-lb on the 88 mm body. A plug-seal disc only has to stay on: 12 to 16 in-lb, and more is worse. PET threads creep under sustained load, so torque is checked 24 hours after closure rather than at the capping head.

• 1 Quality control: production inspection, packaging inspection and shipment inspection, sampled at AQL 2.5 against ISO 2859-1 unless your QA specifies otherwise.
• 2 Cost: one quote covering jar, cap, liner, decoration and export packing, so landed cost is not rebuilt line by line at your end.
• 3 After-sales: complaints answered within one working day, checked against the batch number and the retained samples from that run.
• 4 Logistics: FOB, CIF or DDP, cartons palletised to your warehouse spec.
• 5 Design support: artwork template for the printable band, label dieline, 3D render before tooling.
• 6 Samples: free stock sample, freight collect; custom colour sample charged and credited against the bulk order.
• 7 OEM and ODM: your logo, your Pantone, your carton print.

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