20mm Silicone Vial Caps
20mm Vial Caps — Flower and Round Dust Caps for 5ml Vials
These20mm vial caps are the finishing touch for 20 mm crimp-neck vials: a soft, snug dust cap that stretches over the vial mouth in two styles — a scalloped flower shape and a classic round shape — in six stocked colors. Use them on opened 5ml vials to keep dust out between doses, on stored vials to keep the crimp clean, or as a color code across your product line. They are washable, reusable, and priced to put one on every vial you ship. Factory-direct from our 15,000㎡ plant — MOQ 1,000 pcs, free sample, 15–25 day lead time.
Specifications & Sizes — 20mm Silicone Vial Caps
| Item | Specification |
|---|---|
| Model | 20mm Vial Cap — Flower / Round |
| Neck finish | 20 mm crimp (standard flip-off cap size) |
| Representative vial | 5ml glass vial, approx. 22 mm outer diameter × 40 mm height |
| Styles | Flower (scalloped rim) and round dome — same fit, same price |
| Colors | Six stocked colors; colors ship assorted, specified colors on request |
| Material | Flexible silicone rubber; material certificates on request |
| Reusability | Washable and reusable |
| Printing | UV-printed logo on the cap top, + US $0.10 / pc |
| MOQ | 1,000 pcs — stocked, specified colors and logo alike |
| Lead time | 15–25 days |
Color & Finish — Six Stocked Colors
Six stocked colors cover the set: colors ship as an assorted mix by default, and you can specify a color mix in your inquiry — we confirm availability and lead time. Your UV-printed logo goes on the cap top (+ US $0.10 per piece), so a plain dust cap becomes a branded touchpoint on every vial.
Flower & Round — Two Shapes, One Fit
Both shapes share the same 20 mm grip and the same price. The flower shape carries a scalloped rim — easier to pinch off a shelf and more distinctive in a retail kit. The round shape is the low-profile classic that disappears against the vial. Stock both and let the customer pick.
How the Dust Cap Is Used — Opened Vials First
After opening (the main use). Once the flip-off cap comes off and the stopper is pierced for multi-dose use, the vial mouth is exposed. A silicone vial cap stretches back over it and keeps dust, splashes and drawer grit away between withdrawals — the routine for peptide and hormone vials that stay in service for weeks.
Before opening. Capping stored and shipped vials keeps the crimp clean, protects the aluminum ring from scratches, and makes a shelf of vials read as a finished product.
Color coding. Six stocked colors let a clinic or pharmacy mark compound, batch or open date at a glance — color is a function here, not decoration.
One boundary: these are dust caps, not a sterile seal. They do not replace the rubber stopper or the crimp, and they do not certify sterility — store opened vials as your product's own guidelines direct.
Will These Caps Fit My Vials?
These caps are sized for vials sealed with a standard 20 mm flip-off crimp cap — the neck finish of typical 5ml glass vials (our representative 5ml vial measures about 22 mm outer diameter × 40 mm height). The rim stretches over the crimp cap or the opened vial mouth and grips by elasticity, so there is no adhesive and no tooling to press. Send us your vial's neck size and we confirm the fit with a sample before production.
We also supply 2ml glass vials,3ml glass vials,10ml glass vials,amber glass vials, and other pharmaceutical glass vials, so caps and vials ship from one factory as one matched set.
Why Choose These 20mm Silicone Vial Caps
- Snap on, stays on — the rim is sized to the 20 mm neck finish and holds by elasticity; no adhesive, no tools.
- Color is a feature — six stocked colors turn a plain vial into a color-coded line; colors ship assorted, specified colors on request.
- Washable & reusable — rinse, dry, cap again; a consumable that keeps working after the box is opened.
- Two shapes, one price — scalloped flower for grip and shelf appeal, round for a low-profile classic.
- Priced to bundle — at this unit price a dust cap can go into every vial kit you sell.
Applications of the 20mm Silicone Vial Caps
Peptide and hormone clinics capping multi-dose vials between doses · compounding pharmacies color-coding preparations · retail vial kits that ship with a cap on every vial · labs covering larger sample vials in cold storage · distributors bundling caps with vial holders and glass vials.
Materials & Care
Molded from flexible silicone rubber — soft, elastic, and comfortable in refrigerator or freezer storage. The caps rinse clean under water and are reusable. Colors are produced with masterbatch and checked against an approved sample. Material certificates (for example food-contact grade) are available on request — tell us your market and we provide the matching document.
Factory QC & Quality Assurance
Every batch of these silicone vial caps passes the in-house check matrix below:
| QC check | What we check & pass standard |
|---|---|
| Dimension check | Inner diameter, height and wall thickness of every batch measured against a master 20 mm crimp cap |
| Retention check | Capped vial inverted and lightly tapped on our test jig; the cap must stay seated (pull force logged on our force gauge) |
| Visual inspection | 100% appearance check for flash, tears and deformation before packing |
| Color consistency | Masterbatch lot logged; colors compared against the approved sample under standard lighting |
| Material lot control | Raw silicone lot certificate and molding parameter log kept per batch |
| Packing check | Piece count per bag and carton verified against the order before sealing |
Release flow: batch sampled → in-process log reviewed → final inspection signed → pack out.
Customization — Custom 20mm Silicone Vial Caps from MOQ 1,000, Logo + US $0.10 / pc
Stocked colors and both shapes start from MOQ 1,000 pcs — and the same MOQ applies to a specified color program or your UV-printed logo (+ US $0.10 per piece). Send your logo artwork; we return a printed sample photo for approval before mass production. Confirmed orders ship in 15–25 days.
Pricing, MOQ & Order Volume
Indicative pricing for this item is quoted in a band of US $0.20 – 0.34 / pc EXW Guangdong, before freight. Where you land inside that band is set by two things: how far the build is customized, and how large the run is. The lower end of the band is not an order-quantity price — it is the level we reach on high-volume and repeat programs, where tooling and print setup are spread over a large piece count. At the MOQ the same assorted colors build is quoted at the figure shown below. We would rather put both numbers on the page than let you anchor on one we cannot hold at small quantities.
| Configuration | Order quantity | Indicative unit price (EXW) |
|---|---|---|
| Standard build — assorted colors, no logo | MOQ — 1,000 pcs | US $0.24 / pc |
| Standard build — assorted colors, no logo | High-volume runs and repeat orders | towardsUS $0.20 / pc |
| Add your custom UV-printed logo to the standard build | MOQ and up | +US $0.10 / pc (0.24 + 0.10 = US $0.34 / pc) |
| Fully customized build + logo — a specified color program, custom packaging, or a custom size | 1,000 pcs and up | up to US $0.34 / pc |
In short: US $0.24 / pc for the standard build at the MOQ of 1,000 pcs, stepping down towards US $0.20 / pc as quantity grows, and up to US $0.34 / pc for a fully customized build with your logo. Every figure is indicative and subject to the specification on your drawing.
Quantity is the main lever. Pricing is quoted against your actual quantity, colour and finishing. A short run carries more setup per piece; high-volume and repeat quantities spread that setup and move the unit price down towards the lower end of the band. Because artwork and tooling stay on file, a reorder skips the setup step. Send your target quantity and we return a tiered quote — for example 1,000 / 5,000 / 10,000 pcs — with the sample plan.
MOQ. MOQ is 1,000 pcs across the range — assorted colors as-is, a specified color, or your UV-printed logo (add US $0.10 / pc) all start from the same quantity. Anything further (a specified color program, custom packaging, or a custom size) is quoted on your drawing at the same MOQ.
Prices are indicative, quoted EXW Guangdong, and exclude freight, duties and packing extras. The final quotation follows your specification, quantity, artwork and packing requirement — quotation within one working day, sample approved before mass production.
FAQ — 20mm Silicone Vial Caps
One Cap Family, Two Neck Sizes
This page covers the 20 mm neck finish — the size used by 5ml glass vials. For the 13 mm neck finish used by typical 2ml and 3ml glass vials, see the 13mm silicone vial caps page. Both sizes share the same two shapes, six colors, MOQ and pricing structure, and the two sizes can be mixed in one shipment.
Send your vial neck size, color mix and logo artwork — quotation within one working day, free sample before mass production.
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