Ordering caps and closures to your own specification — OEM — means getting a few things right so the cap seals, runs on your line and meets the rules in your market. Here’s what to put on the spec.
Match the neck first
The closure is fixed by the bottle’s neck finish, so confirm it before anything else. Delta El Nile for Industry runs 12 closure formats across the common finishes — PCO 1881 (CSD), 29/25 and 48 mm / 55 mm (water), 33/15 (juice), 38 mm (dairy) and 29/21 (oil). A cap and neck from different standards will not seal.
Material and seal
HDPE gives rigidity for carbonation pressure; PP suits hot-fill and certain hinged formats. The liner or sealing geometry is what actually holds pressure or vacuum, so specify the product (still, carbonated, hot-fill, oil) and let it drive the material and seal, not the other way round.
Compliance: tethered & tamper-evident
For EU single-use beverage containers up to 3 L, caps must stay tethered (SUP Directive, since July 2024). Most standard finishes are tethered-ready. Add a tamper-evident band where the market or product requires it.
Colour, branding and MOQ
Custom colour is set with masterbatch to your reference; minimums follow the run economics for the format. Confirm colour, torque target band and packing in the RFQ so the first lot matches your line.
Build an RFQ with your neck, product and colour for an OEM closure quote.