Can I Put Drinking Glasses or Mugs in the Oven? Guide to Oven-Safe Utensils
When it comes to adding drinking glasses or mugs to the oven, it's essential to know the material they are made of to avoid potential hazards. This guide will help you determine which vessels are safe for reheating and which need to stay out of the oven.
Metal Mugs and Glasses
If you're using a pure metal mug, such as a camping mug, it should be safe to place in the oven. However, double-check that it doesn't contain any plastic elements, as these can react poorly to heat. Nonstick finishes may also not be oven-safe and can release toxic fumes. If the cup is marked as oven-safe, you're good to go!
Plastic and Acrylic Mugs
Plastic and acrylic mugs are not oven-safe and will melt when placed in the oven. Opt for glass or specially marked ceramics instead, as these are much more durable and heat-resistant.
Ceramic Mugs
Ceramic mugs are oven-safe, but only if the glaze used is specifically heat-resistant. They are typically produced at much higher temperatures in kilns, so they should handle the oven's temperatures well. However, avoid placing them in the oven if they have plastic handles or grips, as these can melt and pose a safety hazard.
If you're unsure about the safety of your ceramic mugs, err on the side of caution and check for a label that states they are oven-safe. Even ceramic mugs that are oven-safe should not be subjected to rapid temperature changes to avoid cracking.
Heat-Tempered Borosilicate Glass
Borosilicate glass, known for its high heat resistance, can be used in the oven. This type of glass has been gaining popularity for baking, but it's important to note that not all borosilicate glassware is designed for oven use.
The story behind the first oven-safe glassware began in the 1930s when Bessie Littleton, the wife of Jesse T. Littleton, a Corning scientist, used a cut-off Pyrex jar to bake a sponge cake. This incident led to the development of high-temperature-resistant glassware, which is now commonly known as Pyrex.
Today, oven-safe glass is more commonly made from soda lime silicate glass, a material that has been used for cooking vessels for a long time. One iconic brand known for its oven-safe glass is Anchor Hocking. These glasses are safe for oven use if they are labeled as such and are not scratched, chipped, or damaged.
Understanding Oven-Safe Labels
It's crucial to read the bottom of your drinking vessels to ensure they are safe for the oven. If the mug or glass doesn't have an oven-safe label, it's best not to use it in the oven. Even if you think a piece of glassware or ceramic is oven-safe, perform a quick inspection to ensure it's in good condition. Cracked or damaged glassware can be unsafe when placed in high temperatures.
Conclusion
The key to safely using drinking glasses or mugs in the oven is understanding the material they are made of. Metal and heat-tempered borosilicate glass are excellent choices, as long as they are labeled as oven-safe. Plastic and acrylic mugs should stay out of the oven due to their inability to withstand high temperatures. Always check for oven-safe labels and ensure vessel integrity before using them in the oven. With the right knowledge and caution, you can safely incorporate glassware into your baking and reheating needs.
Photo Credit: Corning Museum of Glass