Packaging supplies by Lancing Ltdsales@lancinguk.com01494 623015
Product range

Caps

Browse bottle caps, closures, pumps, sprayers, flip tops and specialist closure options for compatible packaging projects. Every item is contact for price. 65 products are listed in this range. Check neck sizes, liners and closure formats in our cap and closure guides.

Closure compatibility

Specify the cap by finish, seal and function—not diameter alone.

The closure is part of the primary pack. A visually similar cap can use a different thread, sealing system, liner, bore, tamper-evident band or application method, so bottle and cap references should be approved together.

Compatibility checks

Neck finishConfirm the complete finish designation or drawing, including thread profile, sealing land, bore and tamper bead.
SealIdentify whether sealing is provided by a liner, bore seal, plug seal, wad or another feature and whether it suits the contents.
FunctionDefine screw, flip-top, disc-top, pump, spray, trigger, child-resistant or tamper-evident operation and the opening experience required.
ApplicationSet the closure presentation and application method, then validate torque, engagement, band break and leak performance on the actual bottle.
DispensingFor pumps, sprays and triggers, confirm dip-tube length, output requirement and product compatibility without assuming performance from the closure name.

Colour, liners and end-of-life instructions

Colour can support branding or line identification, but the pigment and closure material should be included in any environmental assessment. Small caps can be lost during sorting when separated. Recycle Now's symbol guidance explains that some packs instruct consumers to replace the cap after rinsing so it remains attached to the larger container; use only the instruction supported for the finished pack.

Liner and tamper-evident features can be essential to performance but may introduce another material. Record them in the specification and claim evidence. Where child resistance, food contact or chemical resistance is required, obtain the applicable documentation and test the exact bottle/closure combination.

Send bottle and cap samples or exact references, contents, fill conditions, capping method, required function, quantity and any compliance evidence needed. Use the bottle and cap compatibility guide and closure guide before requesting production quantities.

Request a packaging quote View coloured screw caps

Closure compatibility controls

A matching diameter is only the first closure check.

Secure bottle closure depends on the complete neck finish, thread or snap geometry, sealing surface, liner or plug, closure material and the filled product. The application method and required evidence of opening, tamper indication or dispensing also affect the selection.

What to define

  • Full bottle neck specification or a representative bottle sample.
  • Closure type, material, colour and any liner, wad, plug or induction-seal requirement.
  • Contents, filling temperature, storage orientation and expected opening or dispensing behaviour.
  • Manual or automatic application and whether controlled application torque, pressing or alignment is needed.
  • Tamper-evident band, tear strip, overcap or other visible evidence requirement.

What to approve

Use the intended bottle and contents to evaluate engagement, seal contact, leakage, back-off, stress, liner behaviour, dispensing and repeated opening where relevant. Torque values and settings must come from the actual closure/bottle trial and the component supplier guidance; they should not be inferred from another pack.

Record the bottle and closure references together. If either component changes, decide whether the fit and compatibility assessment must be repeated.

Closure evidence and recycling assessment

Document closure and liner materials separately from the bottle. Attached or retained components can influence a complete-pack recyclability assessment, while consumer-removable parts may be treated differently under the current methodology. The UK EPR guide links to the reporting-year source. For bottle and closure trial planning, use the compatibility test plan.

Request compatible closure options Compare bottle materials

Closure questions

Questions that should be resolved with the bottle, product and capping process.

Closure performance is created by the interaction between neck, thread, sealing surface, liner or plug, application method and filled product—not by nominal diameter alone.

Why can two closures with the same nominal diameter behave differently?

Closures with the same nominal diameter can use different thread forms, heights, tamper bands, sealing systems or liner geometries. Those differences change engagement and sealing. Match the complete neck-finish specification and test the exact pair. The cap leak and cross-thread guide explains common failure paths.

What does a cap liner need to do?

A liner may need to seal surface irregularities, resist the packed product, maintain compression through storage and support the chosen tamper-evident or induction-seal arrangement. The correct construction depends on the closure, neck land, product and process. Use the liner compatibility guide rather than choosing by colour or thickness alone.

What affects cap application torque and leak performance?

Application torque, chuck or spindle condition, thread start, neck support, bottle rigidity, liner compression, product contamination and temperature can all affect the result. A higher torque is not automatically safer and can damage threads or tamper features. Establish a controlled application window through representative capping and leak tests.

When is tamper evidence a pack-system question rather than a cap-only question?

Tamper evidence is a pack-system question whenever performance depends on the bottle bead, neck finish, liner, induction foil, shrink band, opening sequence or visible evidence after first use. The closure and container must be approved together, with the actual filling and capping process and any legal or customer requirements reviewed by the competent team.

How should closures be assessed with PET or HDPE bottles?

Assess the exact bottle and closure combination because PET and HDPE can differ in stiffness, neck behaviour and response to capping loads. Confirm thread fit, liner or plug seal, tamper-band function, removal behaviour and filled-product compatibility. Compare the bottle materials in the PET versus HDPE guide.

Request closure matching Review cap leak causes