# Aluminum-plastic non-spill screw cap, GPI 28-400 and 33-400

> An aluminum-plastic non-spill screw cap for GPI 28-400 and 33-400 bottle finishes (30 and 35 mm), used on spirits, liquor and beverage bottles.

- Category: [Caps and closures](https://www.mars-glass-factory.com/products/closures/)
- Product reference: MG-1600076115881
- MOQ: 100,000 pcs
- Reference FOB price (2026-10): $0.04-0.06 per piece
- Neck finish: GPI 28-400 / 33-400

## Overview

This screw cap pairs an aluminum outer shell with a plastic inner, and fits GPI 28-400 and 33-400 bottle finishes. In GPI terms, the first number is the nominal neck diameter in millimeters and "400" is a shallow single-turn thread, a common finish on spirits and beverage bottles. The listed cap sizes are 30 mm and 35 mm, and the cap has a non-spill feature.

Color and logo are customized to order. Packing is 2,430 pcs per carton for 28-400 and 4,416 pcs per carton for 33-400. The minimum order is 100,000 pcs. The factory works to an ISO 9001 quality system. We also make glass bottles with these finishes, so caps and bottles can be quoted together.

## Key points

- Fits GPI 28-400 and 33-400 finishes
- 30 mm and 35 mm cap sizes
- Aluminum shell with plastic inner
- Non-spill design
- Custom colors and logo

## Specifications

| Property | Value |
| --- | --- |
| Type | Screw cap |
| Material | Aluminum-plastic |
| Neck finish | GPI 28-400, GPI 33-400 |
| Size | 30 mm, 35 mm |
| Feature | Non-spill |
| Color | Custom |
| Logo | Custom logo accepted |
| Certification | ISO 9001 |
| Packing | 2,430 pcs/carton (28-400); 4,416 pcs/carton (33-400) |
| Origin | Shanghai, China |

## FAQ

**What does GPI 28-400 mean?**

It is a standard bottle finish: a 28 mm nominal neck diameter with a 400-style shallow single-turn thread.

**What is the MOQ?**

The MOQ is 100,000 pcs. Color and logo are customized within that order.

**Can you supply bottles with this finish?**

Yes. We make glass bottles and can quote bottles and caps together to the same finish.


Request a quote: https://www.mars-glass-factory.com/products/closures/aluminum-plastic-screw-cap-gpi-28-400-33-400/#inquiry or email inquiry@mars-glass-factory.com