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Watch Out! You Could Be Making This Dangerous Mistake with Your Pyrex Dish

Reuben Bread Pudding

Pyrex was made to withstand high heat and won't ever shatter—right?

I started using Pyrex glassware before 1998, so I consider the products to be almost miraculously heat-resistant. Back then, you could safely take a dish from one temperature extreme to another—refrigerator to freezer to oven—without having to worry about glassware shattering from the change in temperature. (It’s a phenomenon known as “thermal shock.”) It was a thing of beauty for any home cook who likes to prepare a family-favorite 13×9 casserole on Sunday night, and pop it right in the refrigerator for a weeknight meal.

But what many folks don’t know is that somewhere along the line, things changed, and Pyrex glassware is no longer thermal shock-resistant. If used improperly, the dish can shatter into hundreds of tiny pieces inside your oven—leaving you with a potentially harmful mess. Here’s what you need to know:

 

 

The original Pyrex is thermal shock-proof

When Corning started manufacturing Pyrex in 1908, they were using borosilicate glass. That’s what made Pyrex thermal shock-resistant. Until 1998, all Pyrex glassware was made with borosilicate glass. That means that if you have Pyrex glassware made before 1998 (like this gorgeous vintage design), you can safely use it like you always have—making a baked mac n’ cheese casserole and leaving the dish on your cold granite countertop or immediately transferring it to the fridge for tomorrow’s dinner.

The classic Pyrex is one thing you should never pass up at Goodwill—here’s what else you should grab.

 

 

Why things changed

In 1998, Corning sold the Pyrex brand to World Kitchen LLC, which stopped using borosilicate glass and started using soda-lime glass, according to Consumer Reports. Soda-lime glass is just ordinary glass. It’s not resistant to thermal-shock, and it could shatter when going from one temperature extreme to another. So if you’ve bought new Pyrex glassware since 1998, it’s important to keep in mind that what you have is ordinary glassware and it needs to be handled with care. Here’s what Consumer Reports recommends:

In other words, easy casseroles can still be your go-to as long as you’re careful with the temperature extremes!

Make these easy casseroles for dinner

Chicken Noodle Casserole

Everyone who tries this comforting, cheesy chicken noodle casserole asks for the recipe. It's so simple to make that sometimes I feel like I'm cheating! —Kay Pederson, Yellville, Arkansas
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Baked Chops and Cottage Fries

Convenience items like frozen vegetables, cottage fries and a jar of cheese sauce make it a snap to assemble this comforting pork chop supper. It's a simple one-dish meal. —Gregg Voss, Emerson, Nebraska
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Contest-Winning Broccoli Chicken Casserole

This delicious chicken and broccoli casserole is a twist on chicken divan that came from an old boss. It’s quick, satisfying comfort food. —Jennifer Schlachter, Big Rock, Illinois
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Reuben Bread Pudding

Our Aunt Renee always brought this casserole to family picnics, and it became so popular that she started making two or three to bring. —Johnna Johnson, Scottsdale, Arizona
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Stuffing & Turkey Casserole

This is a plate full of love, comfort and goodness. —Debbie Fabre, Ft Myers, Florida
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Southwest Vegetarian Bake

This veggie-packed casserole hits the spot on chilly nights. But it's equally good any time I have a taste for Mexican food with all the fixings, too. —Patricia Gale, Monticello, Illinois
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Contest-Winning Chicken Wild Rice Casserole

While this special chicken and wild rice casserole is perfect for a company dinner, it's also just too good not to make often for everyday family meals. We think it is very nice served with some crusty rolls or French bread. —Elizabeth Tokariuk, Lethbridge, Alberta
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Seafood Casserole

A family favorite, this rice casserole is stuffed with plenty of crab and shrimp to make a special dish that's also hearty, homey and so easy to make! —Nancy Billups Princeton, Iowa
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Taco Salad Casserole

This casserole tastes like a taco salad and is a breeze to assemble. I crush tortilla chips to form a bottom layer, then spread on refried beans, a spicy meat mixture and cheese. —Rhonda McKee, Greensburg, Kansas
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Chicken Amandine

With colorful green beans and pimientos, this attractive casserole is terrific for the holidays. This is true comfort food at its finest. —Kat Woolbright, Wichita Falls, Texas
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Rice-Stuffed Peppers

Mother used to fix this wonderful, easy dish when we had company. She was from a family of fantastic Cajun cooks, so our food was always well-seasoned. In Louisiana, rice is part of many meals. The cheese sauce sets these stuffed peppers apart from any others I've tried. —Lisa Easley, Longview, Texas
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Chili Mac Casserole

This cheesy casserole uses several of my family's favorite ingredients, including macaroni, kidney beans, tomatoes and cheese. Just add a leafy salad for a complete meal. —Marlene Wilson, Rolla, North Dakota
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Chicken and Swiss Stuffing Bake

I love to cook but just don't have much time. This casserole is both comforting and fast, which makes it my favorite kind of recipe. I serve it with a green salad. —Jena Coffey, Sunset Hills, Missouri
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Chicken Tortilla Bake

Mother frequently made this comforting casserole when I was growing up. Our family would scrape the pan clean. Chicken, cheese and zippy green chilies are a mouthwatering mix.—Jerri Moror, Rio Rancho, New Mexico
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Sauerkraut Casserole

Mom brewed her own sauerkraut and, of course, the cabbage was from our big farm garden! Blending the kraut with spicy sausage and apples was Mom's favorite way to fix it, and I still love this country dish. —Rosemary Pryor, Pasadena, Maryland
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Artichoke Ratatouille Chicken

I loaded all the fresh produce I could find into this speedy chicken dinner. Serve it on its own or over pasta. —Judy Armstrong, Prairieville, Louisiana
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Potluck Taco Casserole

This is the dish I take most often to potlucks, and the pan comes home empty every time. It has the irresistible taco taste that everybody craves. —Kim Stoller, Smithville, Ohio
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Penne and Smoked Sausage

My sausage pasta is a must-try dish. It just tastes so good when it’s hot and bubbly from the oven. The cheddar french-fried onions lend a cheesy, crunchy touch. —Margaret Wilson, Sun City, California
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Chicken Enchilada Bake

Your family is going to gobble up this cheesy, southwestern chicken enchilada casserole…and will ask for it again and again. It’s real comfort food! —Melanie Burns, Pueblo West, Colorado
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Tomato, Sausage & Cheddar Bread Pudding

This savory dish is the perfect excuse to have bread pudding as the main meal, not merely afterward as dessert. — Holly Jones, Kennesaw, Georgia
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Crunchy Almond Turkey Casserole

A special cousin shared the recipe for this comforting casserole. The almonds and water chestnuts give it a nice crunch. —Jill Black, Troy, Ontario
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Grandma's Rice Dish

My grandmother often made rice dishes when I was young. I forgot about this casserole until I found myself one day adding the same ingredients to leftover rice. The memories came flooding back, and I've made this recipe regularly since then. —Lorna Moore, Glendora, California
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Meatballs Sausage Dinner

One day I was having trouble deciding what to make for dinner, so I combined whatever was in the refrigerator and freezer. To my surprise, everyone loved it! —Elizabeth Martz, Pleasant Gap, Pennsylvania
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Corn Bread Chicken Bake

To make the most of leftover corn bread, try this hearty main dish casserole. It's moist, delicious and good on any occasion. —Madge Britton, Afton, Tennessee
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Golden Pork Chops

I have a large family and am always looking for easy recipes that will please all of them. This pork chop dish is definitely one of them. —Betty Sparks, Windsor, Connecticut
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Chili Tortilla Bake

A homestyle Tex-Mex casserole is all it takes to gather the whole family around the dinner table. With its popular flavors and bubbly cheese topping, there is never a need to worry about leftovers. —Celine Weldy, Cave Creek, Arizona
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Mexicali Casserole

If you like Mexican food but are watching your diet, try this tasty bake. It takes advantage of ground turkey and reduced-fat cheese without sacrificing flavor. —Gertrudis C. Miller, Evansville, Indiana
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Chicken Casserole

The original old family recipe for this casserole called for the sauce to be made from scratch. Through the years, I developed this version that takes less time to prepare and still tastes great. It's an attractive main dish. —Ruth Van Dyke, Traverse City, Michigan
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Creamy Turkey Casserole

I sometimes make turkey just so I have the extras for the casserole! —Mary Jo O'Brien, Hastings, Minnesota
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Black Beans with Bell Peppers & Rice

My meat and potatoes husband goes for this cheesy, hearty black beans and rice recipe, and the kids gobble it up. For extra kick, add a splash of hot sauce. —Stephanie Lambert, Moseley, Virgina
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Ham & Cheese Potato Casserole

This recipe makes two cheesy, delicious casseroles. Have one tonight and put the other on ice for a future busy weeknight. It's like having money in the bank when things get hectic! —Kari Adams, Fort Collins, Colorado
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Turkey & Spinach Stuffing Casserole

I know dried cranberries may seem like an odd ingredient to include in this dish, but they add just a hint of sweetness that makes this easy casserole so special. —Gilda Lester, Millsboro, Delaware
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Ham 'n' Tater Bake

Get ready for a gourmet loaded baked potato in casserole form. This is so good, I can’t resist making it several times a month. And, it’s a quick and easy dish for company, too. My sister gave me the recipe, and I’m always happy to pass it along. —Peggy Grieme, Pinehurst, North Carolina
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TLC (Thanksgiving Leftover Casserole)

Turkey, stuffing and veggies come together into a fabulous day-after casserole. Top it off with chopped pecans. There’s comfort in every bite.—Barbara Lento, Houston, Pennsylvania
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Church Supper Spaghetti

Because this recipe feeds so many, I often take it to church dinners and potlucks. This colorful dish also comes in handy when we have lots of help to feed on our farm. —Verlyn Wilson, Wilkinson, Indiana
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Pineapple Ham Casserole

Living in Hawaii, I wanted to share this recipe which features pineapple. It's our most important fruit crop. —Marsha Fleming, Kula, Hawaii
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Chicken Zucchini Casserole

A co-worker shared this recipe that was originally her grandmother's. When I make it, I use pre-cooked chicken from the grocery store and fresh zucchini my neighbor gives me from his garden. —Bev Dutro, Dayton, Ohio
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Turkey Spaghetti Casserole

My mom made this creamy comforting dish when I was growing up. Whenever I have leftover chicken or turkey, I look forward to making this simple, yet tasty, filling dish. —Casandra Hetrick, Lindsey, Ohio
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Mushroom Chicken with Wild Rice

Fix chicken dinner in a snap with this simple recipe. It warms you up, head to toe. —Cindy Cothern, Nampa, Idaho
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Creamy Ham & Cheese Casserole

I felt so proud when I created this recipe, which my husband loved! Leftover ham, convenient cooking creme and garlic-herb seasoning make this pasta toss so delicious. —Betsy Howard, Saint Louis, Missouri
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Author
Lauren Cahn
Lauren Cahn is a New York-based writer whose work has appeared regularly in The Huffington Post as well as a variety of other publications since 2008 on such topics as life and style, popular culture, law, religion, health, fitness, yoga, entertaining and entertainment. She is also a writer of crime fiction; her first full-length manuscript, The Trust Game, was short-listed for the 2017 CLUE Award for emerging talent in the genre of suspense fiction.