Roll-on: a 19–35 mm PP, PE or stainless-steel ball in a snap-fit housing on a 30–100 ml bottle, sealed at rest by a soft seat ring in the cap — for liquid and gel natural formulas; from ~500 pieces, 7–25 days. Twist-up stick: a propel-repel spiral elevator driving a carrier cup, 50–75 g — for solid baking-soda, magnesium and wax formulas; low thousands stock, 5,000–10,000 moulded-in colour, 15–25 days. Spray: a stock 12.5–24 mm fine-mist sprayer at 0.1–0.2 ml per shot on glass, PETG or aluminium — for alcohol-based formulas, which rule out PET above ~30% ethanol; ~2,000 printed, 7–25 days plus sprayer in parallel. Sprayed colour on any of them is 2,000–5,000 per shape and 30–40 days.
Roll-on: how the ball works
A roll-on is the simplest of the three. A ball of 19–35 mm sits mostly inside a snap-fit PE, PP or PC socket and turns freely; product wets the exposed surface as it rolls. Two tolerances are the whole product: too loose leaks in a bag, too tight will not roll — and a socket that rolls on water can seize on a 2,000–50,000 mPa·s gel. At rest the seal is not the ball; it is a soft seat ring inside the screw cap that presses the ball down onto the socket, which is what stops an alcohol or perfume roll-on evaporating on shelf. Ball, housing and neck are one system and are specified together, never separately.
| Roll-on item | Specification | Natural-formula note |
|---|---|---|
| Bottle | 30–100 ml (stock 50 · 60 · 75 ml); PP or PET; glass for alcohol-based or perfume roll-ons | Alcohol above ~30% → glass or alcohol-rated PETG, not PET; pH below 4 → PP or glass |
| Ball | 19–35 mm; PP / PE or stainless steel | Essential-oil formulas → test the housing gasket; a larger ball spreads faster |
| Housing | Snap-fit PE / PP / PC socket | Roll smoothness verified on samples filled with your bulk, not water |
| Seal at rest | Screw overcap with soft seat ring | Vacuum leak −0.06 MPa (−0.08 MPa 15 min ≤0.5% for alcohol); 24 h inverted |
| MOQ / lead time | From ~500 pcs undecorated, 7–25 days; sprayed 2,000–5,000, 30–40 days | Cylindrical body counts as one screen-print colour at ~2,000 |
Twist-up stick: how the elevator works
A stick uses a propel-repel spiral elevator: turning the base rotates a threaded spiral (metal or plastic) that drives a carrier cup up to present the solid and back down to retract it. The spiral tolerance is the whole product — a cheap elevator wobbles, advances unevenly, and fails the 76 cm drop test and the customer. The formula matters twice. A natural solid built on baking soda, magnesium, arrowroot and waxes softens with heat — a 45°C lorry in summer will deform a poorly formulated stick, so the filled pack is held at 48°C for 24–48 h. And baking-soda formulas are alkaline while oil-rich formulas extract plasticisers, so the barrel and cup are PP and the exact formula sits in the exact stick at 48°C for 30 days before production. Plated collars stay exterior-only, with no nickel on skin-contact surfaces.
| Stick item | Specification | Natural-formula note |
|---|---|---|
| Fill | 50–75 g (typical partner-factory range); 15–25 g travel | Oval and round stock shapes; refill cartridges on refillable systems |
| Barrel | PP or ABS; aluminium shell for premium; paperboard push-up for plastic-free | Aluminium dents but plates and anodises beautifully; plastic tolerates drops but scratches |
| Elevator | Metal or plastic spiral with carrier cup, twist base | Full up-and-down cycles filled, no jam, skip or crack |
| Heat / drop | 48°C oven 24–48 h; 76 cm to 1.5 m onto concrete, filled | No deformation, cap loss or elevator detachment |
| MOQ / lead time | Low thousands stock; 2,000–5,000 sprayed per shape; 5,000–10,000 moulded-in, 15–25 days + 3–15 masterbatch; anodised aluminium 5,000–10,000, 25–40 days | A stick is 4–5 moulded parts, each a separate minimum |
Spray: how the fine-mist pump works
A deodorant spray is a stock fine-mist sprayer of 12.5–24 mm — pump size chosen to the bottle neck, never the reverse — delivering 0.1–0.2 ml per actuation with a SUS304 spring, on a glass, PET, PETG or aluminium bottle with a screw or crimp collar and overcap. Natural sprays are usually alcohol-based, and that decides the bottle: PET fails above ~30% ethanol, swelling and hazing, so the choice is glass, alcohol-rated PETG or aluminium. Because a sprayer has many small parts and its own tooling is costly, nobody tools a custom sprayer for a launch; the sprayer is stock and the minimum belongs to the bottle print. A sprayer tested on water can stream instead of misting on the real formula, so dose and mist pattern are verified on the actual bulk: 0.1–0.2 ml per shot within 0.02 g, even mist, ≥1,500 actuations, collar torque 58.8–224 N by diameter, and the overcap flip-tested without cracking.
MOQ and lead time: ~2,000 with a screen-printed logo, sprayer from stock, 7–25 days for the bottle plus 5–7 for print, sprayer in parallel; a sprayed bottle colour is 2,000–5,000 and 30–40 days; a metallised collar ~10,000. An aerosol body spray is a separate route — tinplate or aluminium can with internal lacquer — where the gasket compound against the propellant blend is the most important line in the spec.
Matching the mechanism to the natural formula
| Natural formula type | Best format | Why | Material rule |
|---|---|---|---|
| Baking-soda / magnesium solid with waxes and butters | Twist-up stick | Solid needs a mechanism to present it; no leak risk | PP barrel and cup; 48°C hold; 30-day compatibility for alkalinity and oils |
| Cream or balm (oil-rich, no water) | Stick (softer formulation) or wide-mouth PP jar | Barely flows; stick if it holds shape at 45°C, jar if it does not | Oil extracts plasticisers — PP, not AS or acrylic in contact |
| Water-based gel or liquid (aloe, glycerine, hydrosol) | Roll-on | Rolls cleanly; gel viscosity sets the socket fit | PP or PE ball; PP or PET bottle; roll tested with the bulk |
| Alcohol-based liquid (witch hazel, ethanol, hydrosol blends above ~30%) | Spray or glass roll-on | Alcohol dries fast; mist or roll | Glass or alcohol-rated PETG, never PET; solvent-grade gaskets; −0.08 MPa leak test |
| Essential-oil-led liquid | Glass roll-on | Oils attack cheap gaskets and PET | Glass bottle, tested housing gasket, seat ring seal |
| Plastic-free positioning | Paperboard push-up stick or aluminium shell | Format is the claim | Push-up tube tolerances checked filled; aluminium anodising control sample |
The rules behind the material column are the same nine that govern every formula on the formula-to-packaging compatibility matrix. Sprayer and pump data are on airless, pump and sprayer specifications.
Private moulds and buffers
Any private mould is 3,000–10,000 pieces plus RMB 25,000–70,000 (≈ USD 3,500–9,700) per component tool and 45–60 days; every quoted cycle is multiplied by 1.3, plus 15 days across Chinese New Year. The published industry floor is 5,000–10,000 per item; the figures above are indicative via partner factories already tooled for small runs. Why a stick is four or five minimums rather than one is in deodorant packaging MOQ from China (2026) and the MOQ index 2026.
The tests that decide the mechanism is right
Deodorant packs fail at the applicator, not the body. Before any minimum is committed, filled samples pass: roll smoothness on the actual gel; elevator full cycles; sprayer dose and mist on the actual liquid; vacuum leak −0.06 / −0.08 MPa and 24 h inverted; 48°C and −15°C for 24–48 h each; 76 cm to 1.5 m drop; the formula at 48°C for 30 days; colour at ΔE under D65 against the family golden sample. The gates are set out on cosmetic packaging quality standards, and the formats on deodorant packaging. Matching the deodorant to the rest of a body line in one spray run is in the haircare and bodycare packaging solution.
Vella is a Guangzhou-based beauty packaging solutions provider — a sourcing partner, not a factory — that routes briefs like this one to vetted partner factories operating to ISO 22716 / GMP, matches the components as one set, and runs the tests above on filled samples before any production run. If a supplier tests the roll-on on water and quotes the stick by the barrel alone, the questions in how to evaluate a China packaging supplier will show it; send your formula type and format via the contact page and the mechanism, materials and per-part minimum come back matched.
Common questions
- How to Open a Pump Bottle That Won't Open: Lock-Down Pumps, Twist-to-Lock, Clip Locks — and What Brands Should Specify
- How Continuous Spray Bottles Work: Bag-on-Valve vs Pre-Compression Pumps, Mist Quality, and Sourcing
- Essential Oil Spray and Roller Bottles: Amber Glass, Fine-Mist Sprayers, Roll-On Balls, Compatibility and MOQ
- Lotion Pump Dose (2 ml vs 4 ml) and the 1,500-Cycle Test: What to Specify
Tell us the formula type —
we match the mechanism.
Baking-soda solid, gel, oil or alcohol liquid. We reply within 24 hours with the format, the contact materials, and the per-part minimum and lead time.
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