For still water, the neck finish is the first fork in the road: it sets the cap, the closure cost and the filling line — so it pays to match it to your format up front.
Calibrated neck-finish gauges in our QC lab, used to check preform neck dimensions. More about our plant →
The three water necks
29/25 is the single-serve water standard (light, low-cost cap). 48 mm suits large-format and sports formats. 55 mm is the 5-gallon / 19 L returnable. Each pairs with a specific closure and weight band.
Lighter is possible
Neck weight is fixed by the finish, but Delta offers lightweight variants on some water SKUs — small per-unit grams that compound across millions of bottles.
Find your fit
Filter by application and neck in the Product Finder to see the exact SKUs, weights and matching closures for your water format.
Frequently asked questions
Which neck finish should I use for a water bottle?
29/25 for single-serve still water, 48 mm for large-format and sports bottles, and 55 mm for 5-gallon / 19 L returnables. Each pairs with a specific closure and weight band.
Can I lightweight a water neck?
The neck weight is fixed by the finish, but Delta offers lightweight variants on some water SKUs — small per-unit grams that compound across millions of bottles.
Ready to specify?
Find your exact SKU and build an audit-ready RFQ in minutes.
