It's no secret that vintage Pyrex is highly sought after. If you're sitting on some Pyrex right now, how can you tell if it's ...

Soda-lime breaks “nicely,” but it is also far less heat resistant. A 234 degree difference, in fact. Soda-lime glass can only withstand a 99 degree quick temperature change.

However, glass food-storage containers that are oven-safe, like borosilicate, soda-lime, and tempered, still have a temperature limit—usually 425 degrees Fahrenheit.

Vintage Pyrex fetches thousands in booming collectibles market One seller on eBay has a 1970s 2-quart Pyrex casserole dish ...

On a chemistry level, however, some glass experts believe soda-lime glass is weaker, as it only has 69% silica contents compared to borosilicate's 80% composition.

Around the 1950s, Corning also began making PYREX bakeware out of tempered soda lime glass, according to Smithsonian magazine.In 1998, Corning sold its consumer product operations to Borden, Inc ...

In all, Fusion5 is five times more scratch resistant, four times more resilient to sharp impacts, and twice as resistant to thermal shock, relative to soda-lime glass.