## Common ground
All options are containers made of iron or steel, used for holding materials.
## Options at a glance
**7309.00 – Large tanks (>300 L)**
- **Defining trait:** Capacity exceeds 300 liters, not designed for transport.
- **Typical examples:** Industrial storage tanks, water reservoirs.
- **Best fit when:** Storing large volumes of liquids or solids on-site.
**7310 – Small containers (≤300 L)**
- **Defining trait:** Capacity 300 liters or less, not for transport.
- **Typical examples:** Steel drums, small fuel cans, chemical storage pails.
- **Best fit when:** Holding smaller quantities in workshops or warehouses.
**7311.00 – Gas containers**
- **Defining trait:** Designed specifically for compressed or liquefied gas.
- **Typical examples:** Propane cylinders, oxygen tanks.
- **Best fit when:** Containing pressurized gases safely.
**7326.90 – Other containers**
- **Defining trait:** Does not fit into the above categories (e.g., unusual shape, mixed use).
- **Typical examples:** Custom steel bins, non-standard storage units.
- **Best fit when:** No clear match to size, function, or transport use.
**8609.00 – Transport containers**
- **Defining trait:** Designed and equipped for multi-modal transport (e.g., ship, truck, rail).
- **Typical examples:** ISO shipping containers, tank trailers.
- **Best fit when:** Used in logistics or intermodal transport.
## Key differences
| Option | Capacity | Gas Use | Transport Design | Lining/Insulation |
|-------|----------|---------|------------------|-------------------|
| 7309.00 | >300 L | No | No | Yes, possible |
| 7310 | ≤300 L | No | No | Yes, possible |
| 7311.00 | Any | Yes | No | Possible |
| 7326.90 | Any | No | No | Yes, possible |
| 8609.00 | Any | No (unless specified) | Yes | Often included |
## How to choose
- Is the container for compressed or liquefied gas? → 7311.00
- Is its capacity over 300 liters? → 7309.00
- Is it under 300 liters and not for transport? → 7310
- Is it designed for shipping across multiple transport modes? → 8609.00
- Does it not fit any of the above? → 7326.90
## Overlaps & pitfalls
- A large gas container (>300 L) could fit both 7309.00 and 7311.00 — prioritize **gas use** over size.
- A transport container may also be >300 L — prioritize **transport design** over capacity.
- If multiple traits apply, choose based on the product’s **main function** (e.g., storage vs. transport)