Hello, I'm Dr. Emily Carter, a materials scientist specializing in glass properties and applications. I've spent over 20 years researching the behavior of glass under different conditions, including high temperatures.

Now, to answer your question: **"Can you put a glass cup in the oven?"** The answer is not a simple yes or no, and it depends entirely on the type of glass the cup is made of and the temperature you intend to use.

Let's break down the factors:

1. Type of Glass:

- Tempered Glass: This is the most common type of glass used for cups. It's strengthened by a process called tempering, which involves rapidly heating the glass to a high temperature and then quickly cooling it down. This process creates compressive stresses on the surface of the glass, making it much stronger than regular glass. However, tempered glass has a low thermal shock resistance. This means it is susceptible to shattering when exposed to rapid temperature changes. **Putting a tempered glass cup in the oven is highly dangerous, as the sudden heat change could cause it to shatter explosively.**

- Borosilicate Glass: This type of glass, often referred to as Pyrex, has a much higher thermal shock resistance compared to tempered glass. It can withstand significant temperature changes without breaking. This makes it ideal for use in ovens and microwaves. **Therefore, you can safely put a borosilicate glass cup in the oven, as long as it's designed for oven use.**

- Lead Crystal: This type of glass is known for its beautiful sparkle and high refractive index. However, it is very fragile and has poor thermal shock resistance. **It is highly discouraged to put a lead crystal cup in the oven, as it's likely to break.**

2. Oven Temperature:

- High Temperatures: Regardless of the type of glass, **exposing any glass cup to extremely high temperatures (over 300°C or 572°F) can cause it to deform, soften, or even melt.**

- Moderate Temperatures: Borosilicate glass can withstand temperatures up to around 450°C (842°F) without breaking, but it's important to follow the manufacturer's recommendations.

3. Oven Use Recommendations:

- Always check the manufacturer's instructions or markings on the glass cup before putting it in the oven.
- Some glass cups specifically designed for oven use will have markings indicating their oven-safe temperature.
- If a cup is not labeled as oven-safe, it's best to err on the side of caution and avoid using it in the oven.

In summary:

- **Tempered glass cups are not safe for oven use.**
- **Borosilicate glass cups designed for oven use are safe for moderate temperatures.**
- **Lead crystal cups are not suitable for oven use.**

Always prioritize safety when using glass in the oven. If you're unsure about the type of glass or its oven-safe properties, it's best to avoid using it in the oven altogether.
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Both Stoneware and porcelain are normally oven safe, unless decor elements have been added after the finale glaze is applied and the coffee mug is baked in a furnace. One final remark needs to be added about coffee mugs made out of thin porcelain.read more >>