Metal packaging: provides near absolute preservation, costs need to be calculated carefully.

When holding a premium tea box or a gift box for Tet, the weight, sturdiness, and cool surface feel come from metal. This is not just an emotional response but also a real function: metal packaging protects the product inside at a level that most other materials cannot match.

What is metal packaging

Metal packaging in the consumer goods and food sector mainly consists of two materials. One is tinplate (tinplate, also known as ETP, which is electrolytically coated steel), with a thickness typically ranging from 0.15 to 0.49 mm depending on the application. The other is aluminum, which appears in thin sheets in composite packaging, tubes, trays, and cans. The thickness of aluminum sheets in flexible packaging is around 6 to 20 microns. From about 15 microns and above, the moisture and gas barrier is nearly absolute.

The core commonality of both: they provide nearly absolute protection against light, oxygen, and moisture, surpassing any conventional materials. This protects the flavor, color, and active ingredients inside, helping to extend shelf life and potentially reduce the need for preservatives.

The most common forms you will encounter in practice:

• Three-piece or two-piece tin boxes: used for tea, cookies, premium candies, corporate gifts.
• Aluminum cans and steel cans: used for beverages and canned foods that require a long shelf life.
• Aluminum tubes and aluminum blisters: common in pharmaceuticals, ointments, and gels.
• Aluminum foil in the composite film structure: a functional layer that blocks moisture inside coffee bags, dietary supplements, and pharmaceuticals.

When to choose, when not to

The most suitable metal appears when two factors coincide: the product needs strict preservation and the brand needs to convey a premium feel from the first touch.

There are two technical points to understand before making a decision. First, the inside of the box and the can that comes into contact with food must have the correct type of protective coating (lacquer), especially for products with high acidity or moisture. Metal is not completely inert with food, so this coating is a mandatory technical requirement, not an option. Second, printing on metal surfaces is completely different from printing on paper: colors absorb and reflect in their own way on metal. Color must be checked directly on the actual material before production runs, and color should not be approved on screens or paper prints.

Regarding compliance: metal packaging that comes into contact with food in Vietnam falls under QCVN 12-3:2011/BYT. If you are exporting to the European Union, be aware of Regulation (EU) 2024/3190 which bans BPA and restricts other harmful bisphenols in food contact materials, effective from the beginning of 2025 with a main transition period until 20/07/2026, and some groups until 20/01/2028 (foreign guidance, for reference only). This section must be reviewed by a legal expert on food contact materials; do not interpret it on your own.

Costs, time and quantity

The cost of metal packaging is high compared to standard materials. The most expensive part is usually the mold and the initial setup fee from the box and can manufacturer, not the unit price per piece. Therefore, the minimum order quantity is often moderate to large to allocate the mold costs to an acceptable level. A small batch on an expensive mold will result in a very high unit price per box, rarely economical for mass-market products.

Production time depends on the can and box manufacturer, the shape, the quantity, and whether new molds need to be made. You should directly ask the manufacturer about the specific lead time for your order as this number can vary.

The design part (box structure, surface graphics, print-ready files) is separate from the production part. Sinh Vũ does not commit to printing prices and does not represent any printing house. You can only get quotes from multiple suppliers and compare them if you have sufficient technical documentation from the design files.

Information needed to consider metal

To assess the feasibility of metal packaging for a specific product, you should prepare the following information:

• Product and SKU number: name, product type, expected size and weight.
• Desired shelf life and storage conditions: for example, needs to be kept for 12 months at room temperature, or requires special moisture barriers.
• Market and distribution channel: selling domestically, exporting to the EU or other markets, retail or corporate gifts.
• Projected yield per order batch: this is a decisive factor for the economics of metal molds.
• Reference budget for packaging and timeline for when products are needed.
• Compliance request if applicable: organic certification, export market regulations, distributor partner requirements.

With sufficient information, it can be assessed whether metal is the right direction for the current stage or if other materials should be considered first. If metal is suitable, the next step is to choose the structure, form, and specific design path.

This article is for reference. The scope, pricing, and specific commitments of Sinh Vũ are detailed in the proposal and signed contract.