# GPI 28-400 and 33-400 aluminum-plastic caps

> Aluminum-plastic screw caps for GPI 28-400 and 33-400 bottle finishes, used on vodka, gin and whisky bottles, with custom color and logo.

- Category: [Caps and closures](https://www.mars-glass-factory.com/products/closures/)
- Product reference: MG-1600966511005
- MOQ: 50,000 pcs
- Reference FOB price (2026-10): $0.05-0.06 per piece
- Neck finish: GPI 28-400 / 33-400

## Overview

These screw caps combine an aluminum shell with a plastic inner and fit GPI 28-400 and 33-400 neck finishes. In the GPI system, the first number is the neck diameter in millimeters and 400 indicates a shallow single-turn thread. Both are common finishes on spirits, sauce and food bottles.

The caps are used on vodka, gin, whisky and other spirits bottles. Cap color is customized and your logo can be added. Packing is 2,430 pcs per carton for the 28-400 size and 4,416 pcs per carton for the 33-400 size. Supply ability is 100,000 pcs per day and goods ship from the Port of Shanghai. Production is ISO 9001 certified and the minimum order is 50,000 pcs.

## Key points

- Fits GPI 28-400 and 33-400 finishes
- Aluminum shell with plastic inner
- Custom color and logo
- Up to 100,000 pcs per day
- ISO 9001 certified production

## Specifications

| Property | Value |
| --- | --- |
| Type | Screw cap |
| Material | Aluminum-plastic |
| Finish | GPI 28-400, 33-400 |
| Outer size | 30 / 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) |
| Supply ability | 100,000 pcs per day |
| Port | Shanghai |
| MOQ | 50,000 pcs |
| Origin | Shanghai, China |

## FAQ

**Which neck finishes do these caps fit?**

They fit GPI 28-400 and 33-400 finishes. Send a bottle sample or drawing and we confirm fit.

**What is the MOQ?**

The minimum order is 50,000 pcs per order.

**Can we have a custom color and logo?**

Yes. Cap color and logo are made to your specification and confirmed with your quote.


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