## Common ground
All options refer to reusable water bottles designed for use on bicycles.
## Options at a glance
**3924.90 – Plastic**
- **Defining trait:** Made from plastic, typically lightweight and impact-resistant.
- **Typical examples:** Hard-shell polyethylene or PET bottles with screw caps.
- **Best fit when:** Weight and durability for long rides are priorities; cost-effectiveness matters.
**7013.9X – Glass**
- **Defining trait:** Made from glass, offering non-reactive, pure taste but higher breakage risk.
- **Typical examples:** Borosilicate glass bottles with silicone sleeves.
- **Best fit when:** Taste purity and eco-friendliness are key; the bottle is used in low-impact settings.
**7323.9X – Iron or Steel**
- **Defining trait:** Made from iron or steel, usually heavy but very durable and thermally insulating.
- **Typical examples:** Thick-walled steel bottles with metal caps.
- **Best fit when:** Long-term durability and insulation are needed; weight is not a concern.
**7615.10 – Aluminium**
- **Defining trait:** Made from aluminium, lightweight with good heat conductivity and recyclability.
- **Typical examples:** Anodized aluminium bottles with screw or flip-top lids.
- **Best fit when:** Lightweight performance and quick cooling are important; common in competitive cycling.
## Key differences
| Feature | Plastic | Glass | Iron/Steel | Aluminium |
|------------------|---------------|---------------|---------------|---------------|
| Weight | Lightest | Heavy | Heaviest | Light |
| Durability | Moderate | Low (fragile) | Very high | High |
| Thermal Insulation | Poor | Good | Excellent | Poor |
| Taste Neutrality | Moderate | Best | Can affect taste | Neutral |
## How to choose
- Is the bottle made of glass? → 7013.9X
- Is it made of metal and very heavy? → 7323.9X
- Is it lightweight and made of aluminium? → 7615.10
- Is it made of plastic and flexible or hard-shell? → 3924.90
## Overlaps & pitfalls
A bottle could be made of aluminium with a plastic cap (still HS Code 7615.10). Glass bottles may have metal lids but are still classified by material. The main function (e.g., hydration) is shared, but the **material** determines classification. If unsure, prioritize the primary construction material