## Common ground
All options refer to drinking glasses made of glass, excluding those made of glass ceramics.
## Options at a glance
**7013.10 – Of glass ceramics**
- **Defining trait:** Made from glass-ceramic material, which is heat-resistant and durable.
- **Typical examples:** Pyrex-like labware, oven-safe drinking vessels.
- **Best fit when:** The glass is designed for high thermal resistance or extreme durability.
**7013.2X – Stemware drinking glasses, other than of glass ceramics**
- **Defining trait:** Features a stem and foot, typically used for wine or champagne.
- **Typical examples:** Wine glasses, champagne flutes, cocktail glasses.
- **Best fit when:** The glass has a raised stem and base, not a solid bottom.
**7013.3X – Other drinking glasses, other than of glass ceramics**
- **Defining trait:** No stem or foot; typically straight-sided and used for water or beer.
- **Typical examples:** Tumblers, mugs, beer glasses (non-stemmed).
- **Best fit when:** The glass is simple, cylindrical, and lacks a stem.
## Key differences
| Feature | 7013.10 (Glass ceramics) | 7013.2X (Stemware) | 7013.3X (Other) |
|---------------------|--------------------------|--------------------|-----------------|
| Material | Glass-ceramic | Standard glass | Standard glass |
| Stem/foot | No | Yes | No |
| Typical use | High-heat environments | Wine/champagne | Water, beer |
## How to choose
- Is the glass made of heat-resistant glass-ceramic? → 7013.10
- Does it have a stem and foot? → 7013.2X
- Is it a simple, straight-sided glass without a stem? → 7013.3X
## Overlaps & pitfalls
A glass could be both stemware and made of glass-ceramic, but the material (glass ceramics) takes precedence in classification. If unsure, prioritize material over form. The term "other than of glass ceramics" in 7013.2X and 7013.3X means these codes apply only to standard glass, not glass-ceramics