## Common ground
All options are baby nutrition, breastfeeding, and care products made from synthetic materials.
## Options at a glance
**3924.90 – Made of plastic material**
- **Defining trait:** Constructed primarily from synthetic plastic (e.g., polypropylene, PET).
- **Typical examples:** Plastic baby bottles, feeding spoons, bottle nipples (plastic), storage containers.
- **Best fit when:** The product is rigid, lightweight, and designed for repeated use or sterilization.
**4014.90 – Made of rubber**
- **Defining trait:** Made from natural or synthetic rubber, typically soft and flexible.
- **Typical examples:** Rubber teats (nipples), pacifiers, soft silicone-based bottle nipples (if classified as rubber).
- **Best fit when:** The product requires elasticity, softness, or a chewable texture for infant comfort.
## Key differences
| Feature | 3924.90 (Plastic) | 4014.90 (Rubber) |
|-----------------------|--------------------------|----------------------------|
| Material flexibility | Rigid to semi-rigid | Soft and flexible |
| Common use | Bottles, containers | Nipples, pacifiers |
| Durability | High (resists wear) | Moderate (can degrade) |
## How to choose
- Is the product rigid or hard? → 3924.90
- Is it soft, flexible, and meant for sucking/chewing? → 4014.90
## Overlaps & pitfalls
Some products (e.g., silicone nipples) may blur the line—silicone is often classified under rubber in HS codes despite being synthetic. If a product is made of silicone, it may fall under either code depending on classification rules. **No priority rule is given**—choose based on the product’s MAIN material and function: plastic for structure and durability, rubber for softness and tactile use