## Common ground
All options are types of lunch boxes categorized by their primary material.
## Options at a glance
**3924.90 – Plastic**
- **Defining trait:** Made primarily from plastic, often lightweight and moldable.
- **Typical examples:** Disposable plastic containers, stackable food boxes.
- **Best fit when:** The box is made of molded or injection-molded plastic, not metal or glass.
**4202.1X – Leather/Composite/Textile/Paperboard**
- **Defining trait:** Constructed from soft materials like leather, fabric, or paperboard, often with a decorative or flexible design.
- **Typical examples:** Canvas tote-style lunch bags, leather-lined boxes, fabric-covered containers.
- **Best fit when:** The box has a soft, flexible outer layer or is designed as a bag or case.
**7013 – Glass**
- **Defining trait:** Made entirely or mainly from glass, typically transparent and heat-resistant.
- **Typical examples:** Glass food jars, Pyrex-style containers.
- **Best fit when:** The box is made of clear, rigid glass with a sealable lid.
**7323.93 – Stainless Steel**
- **Defining trait:** Constructed from corrosion-resistant steel, often durable and thermally conductive.
- **Typical examples:** Insulated steel lunch pails, vacuum-sealed food containers.
- **Best fit when:** The box is metallic, heavy, and designed for long-term use with thermal insulation.
**7615.10 – Aluminium**
- **Defining trait:** Made from lightweight aluminum, often used in thin-walled or collapsible designs.
- **Typical examples:** Lightweight folding lunch boxes, aluminum foil-lined containers.
- **Best fit when:** The box is noticeably light, metallic, and made of aluminum (not steel).
## Key differences
| Material | Weight | Durability | Heat resistance | Transparency | Common use case |
|----------------|----------|------------|------------------|--------------|----------------------------|
| Plastic | Light | Low–Medium | Low | Varies | Disposable, daily use |
| Leather/Fabric | Medium | Medium | Low | No | Fashionable, soft cases |
| Glass | Heavy | High | High | Yes | Reusable, visible contents|
| Stainless Steel| Heavy | Very High | High | No | Insulated, long-term use |
| Aluminium | Light | Medium | Medium | No | Lightweight, portable |
## How to choose
1. Is the box made of glass? → 7013
2. Is it primarily metal (steel or aluminum)? → Proceed to next.
3. Does it feel heavy and rigid with a shiny finish? → 7323.93
4. Is it lightweight, silvery, and thin-walled? → 7615.10
5. Is it made of plastic (molded or disposable)? → 3924.90
6. Is it soft, fabric-like, or covered in leather/fiber? → 4202.1X
## Overlaps & pitfalls
- A **glass-lined metal box** could fit both 7013 and 7323.93; prioritize the main structural material.
- A **plastic-coated fabric box** may overlap 3924.90 and 4202.1X—choose based on whether plastic is primary or secondary.
- If unsure, identify the dominant material by weight, rigidity, and appearance