Why We LOVE Borosilicate Glass (And Honestly, You Should Too)

If you've ever poured boiling water into a regular glass and watched it crack, or worse, shatter dramatically,  you already understand why borosilicate glass exists. It's the superhero of the glass world. Stronger, smarter, and safer than ordinary glass, it's the material we keep coming back to again and again here at Green Shop.

In This Article:

1. What Is Borosilicate Glass?
2. Is Borosilicate Glass Safe?
3. Borosilicate Glass vs Regular Glass
4. The Benefits of Borosilicate Glass
5. Our Borosilicate Glass Products
6. Why Green Shop Chooses Borosilicate Glass

What Is Borosilicate Glass?

Borosilicate glass is a type of glass made with boron trioxide and silica as its primary ingredients: typically around 15% boron trioxide and 80% silica. That chemical combination is what gives it properties that regular soda-lime glass (the everyday stuff) simply can't match.

It was first developed by German glassmaker Otto Schott in the late 1800s and became famous under the brand name Pyrex. Laboratories, hospitals, and scientists have trusted it for over a century because of how stable and reliable it is. Now it's found its way into kitchens and for very good reason.

Is Borosilicate Glass Safe?

Short answer: yes, very. Borosilicate glass is one of the safest materials you can drink from or store food in.

Here's why people ask whether borosilicate glass is toxic, as well as the reassuring answer. Unlike plastic bottles, borosilicate glass contains no BPA, no phthalates, and no hormone-disrupting chemicals that can leach into your water or food. Glass is non-porous, which means it doesn't absorb flavours, odours, or bacteria. What you put in, you get out: nothing more, nothing less.

It also doesn't react with acidic foods or beverages the way some metals can. Your lemon water, kombucha, or tomato-based sauces are perfectly safe in borosilicate glass.

The bottom line: Borosilicate glass is non-toxic, completely chemical-free, and fully food-safe. It's actually one of the least reactive materials you'll find in a kitchen, which is exactly why scientists have used it in labs for 150 years.

Borosilicate Glass vs Regular Glass

Regular glass (soda-lime glass) expands and contracts significantly when temperatures change. Put something very hot in it, and the stress from that expansion can cause it to crack or shatter. It's also softer, which means it scratches and chips more easily over time.

Borosilicate glass has a much lower coefficient of thermal expansion. This is fancy science speak for "it barely expands when heated." This makes it highly resistant to thermal shock: the cracking that happens when glass moves from one temperature extreme to another.

In practical terms:

• You can pour boiling water directly into a borosilicate glass teapot without a second thought
• You can take a borosilicate container from the freezer and put it straight in the oven
• It handles daily temperature swings from fridge to dishwasher to bench without degrading over time

Regular glass can't do any of that reliably. Borosilicate glass can.

The Benefits of Borosilicate Glass

1. Handles the Heat (and the Cold)

Borosilicate glass is oven-safe, microwave-safe, freezer-safe, and dishwasher-safe. It can typically handle temperatures from -40°C all the way up to around 500°C before it even thinks about complaining. Regular glass? Not even close.

2. No Taste, No Chemicals, No Drama

Because it's non-porous and chemically inert, borosilicate glass is completely taste-neutral. Your water tastes like water. Your tea tastes like tea. No plastic aftertaste, no metallic tinge, just the pure flavour of whatever you're drinking.

3. Built to Last

Borosilicate glass is significantly stronger and more durable than regular glass thanks to the higher temperatures used in its manufacture. It's more resistant to scratching and chipping, and while it will still break if you drop it hard enough on tiles (we're not miracle workers), it's far more forgiving in everyday use than you might expect.

4. You Can See Everything

The clarity of borosilicate glass means you can always see exactly what's inside: how much water is left, whether your tea has brewed enough, whether your container needs a wash. No guessing.

5. Genuinely Better for the Planet

A borosilicate glass bottle that lasts years replaces hundreds of single-use plastic bottles. Glass is infinitely recyclable without any degradation in quality, unlike plastic which downcycles with each recycle. Choosing glass is a real, practical step toward less plastic waste—not just a feel-good sticker on a product.

6. Easy to Clean

The smooth, non-porous surface means bacteria, stains, and odours don't hang around. Most borosilicate glass products are dishwasher-safe, but a quick rinse and wash by hand does the job just as well.

Our Borosilicate Glass Products

We're a bit selective about what ends up on our shelves, and borosilicate glass is a big reason why. Here's what we carry:

Borosilicate Glass Water Bottles

Our glass water bottles are made from toughened borosilicate glass and designed for everyday hydration. Available in 550ml, 600ml, and 1 litre sizes, plus a Café Series range for a cleaner, label-free look. Most come with a silicone sleeve for grip and protection, because we all have our moments.

Borosilicate Glass Teapots and Kettles

There's something genuinely lovely about watching tea steep in a glass teapot. Our borosilicate glass teapots and kettles let you do exactly that: heat-resistant enough to use on the stovetop (check individual product specs). The FISSMAN range includes teapots with stainless steel and glass filters in 950ml and 1200ml sizes.

Borosilicate Glass French Press Coffee Makers

Our FISSMAN French press coffee makers use double-wall borosilicate glass that keeps your brew hotter for longer while staying cool to the touch on the outside. Available in 350ml, 600ml, and 1000ml.

Borosilicate Glass Jugs

The FISSMAN 1500ml glass jug is a kitchen staple: great for water, juice, iced tea, or anything else you want to pour and serve in style.

Why Green Shop Chooses Borosilicate Glass

We're not in the business of selling you things that leach chemicals into your drinks, crack the first time you pour hot water in them, or end up in landfill six months later.

Borosilicate glass ticks every box: it's safe, durable, sustainable, and it just works. It's the kind of material that makes everyday life a little better without making a song and dance about it.

That's exactly why it's the only glass we stock. If you're ready to ditch the plastic, browse our full borosilicate glass range and see what fits your life.

Have questions about any of our borosilicate glass products? Get in touch, we're always happy to help.

Benefit 4.  Affordability
Glass is in fact relatively economical to produce and and what's better is that it's an affordable solution.  Its sustainability element is an additional factor that adds to its affordability; with proper maintenance, cleaning and care, your glass equipment can have a sustainable and long life.

Benefit 5. Superior and Durable
Yes, that's right, choose durable over single use plastic bottles. Borosilicate Glass is highly durable. The higher manufacturing temperatures also make the glass much stronger. If you drop borosilicate glass on the floor, and it won’t break like regular glass.

Benefit 6: Environmentally-friendly
Having a good water bottle can help you meet and maintain adequate hydration.  An added bonus is what you taste is exactly what you would expect, there are no chemicals leaching in or changing the taste of your beverage. If drinking from a glass bottle isn’t for you, storing your water in a borosilicate glass pitcher is a great alternative.

Benefit 7: Take with you when travelling
Perfect for picnics, outdoor trips, travels and sports events, your Borosilicate Glass Bottles will keep you safe and well hydrated!

To summarise, Glass bottles made of borosilicate glass are far more durable, better for the environment, and can hold up to changing temperatures, making it super safe and easy to use! By choosing a product made with eco-friendly and high quality borosilicate glass, you can be confident in the quality and longevity of the products!

Shop Glass Bottles HERE