Bottle Caps & Closures: A Buyer's Guide
A bottle is only as good as its closure. The cap keeps the product in, keeps contamination out, and controls how it's dispensed — so it has to match the bottle's neck exactly and suit the way the product is used.
Reading the neck finish
Every bottle neck carries a two-part code such as 24/410 or 28/400. The first number is the neck diameter in millimetres; the second is the thread style (the thread's pitch and profile). A 24/410 cap only seals on a 24/410 neck — same diameter, same thread. Mix the two up and the cap either won't screw on or won't seal, so the closure and bottle must always share the same finish.
Common closure types
| Closure | Best for | Notes |
|---|---|---|
| Screw cap | General storage, shipping | Simplest and most leak-resistant |
| Flip-top / disc-top | Cosmetics, cleaners, shampoos | One-handed dispensing, controlled flow |
| Pump | Lotions, gels, soaps | Measured dose per press |
| Trigger sprayer | Cleaners, garden, mists | Adjustable spray for surfaces |
| Tamper-evident | Food, pharma, supplements | Visible seal shows if opened |
How to choose
- Match the finish first. Confirm the neck code before anything else — it's the most common ordering mistake.
- Match the closure to the use. Shipping favours a plain screw cap; a lotion needs a pump; a household spray needs a trigger.
- Add tamper evidence where the product is ingested or regulated.
Compatibility is handled for you
FUMERO bottles are sold with the cap bundled, so the neck finish and closure are already matched — you never have to cross-reference codes yourself. Bottles ship in bulk at ex-VAT prices with quantity-break discounts, dispatched from Paris via GLS, with a freight option for heavy or pallet orders.
Ready to order? Browse our bottles or read How to choose the right plastic bottle for the full decision.