Why Glass Kitchen Equipment Is Better For Your Health

We’ve all been there… obsessing over organic goodness, blending up green smoothies, switching to non-toxic skincare and filtering our shower water, but what if one of the biggest health risks in your daily routine was in fact sitting on your kitchen counter?

As awareness around hidden toxins grows, more and more of us are rethinking what’s actually ‘clean’ in our homes. We’ve swapped out sulfates and parabens, ditched synthetic fragrances, and detoxed our beauty shelves but few of us have questioned the materials we cook, blend or boil with each day.

That sleek plastic blender, kettle or juicer could be exposing you to chemicals like BPA, microplastics, or hormone disruptors - especially when heat is involved. And even “BPA-free” doesn’t always mean safe. So, what’s the smarter, safer alternative? Let’s take a closer look at glass - the must-have material many modern kitchens are favouring. 

What’s the problem with plastic and what are microplastics?

Plastic is everywhere in our kitchens - from blenders and kettles to measuring jugs, food processors, water bottles and storage containers. And while these items may seem safe on the surface, they could be silently contaminating your food - especially when exposed to heat or prolonged wear.

“Microplastics are tiny particles of plastic (usually between 0.1mm and 5mm) which are found within our kitchen equipment, with chopping boards being one of the largest culprits,” says Registered Nutritionist, Jenna Hope. Evidence suggests that under certain conditions such as heat, prolonged use and wear and tear, microplastics can shed into our food and drinks. “Whilst we need further research, it’s believed that a build-up of nano and microplastics over time can contribute to increased risks of certain cancers, respiratory disorders, inflammation, hormonal dysregulation, cognitive decline and impaired gut function.” “It’s important to note however that not all types of plastics can have the same effects and some are more stable than others.”

In other words, not all plastic is equally risky but regular, long-term exposure may still carry potential health concerns. For those looking to reduce their toxic load, rethinking what materials you cook and store food in is a smart next step.

‘BPA-Free’ isn’t always better

You’ve likely seen labels claiming kitchenware is ‘BPA-free’ - but that doesn’t always mean it’s safe. Many manufacturers now use alternatives like BPS or BPF, which are often assumed to be less harmful. The reality? These substitutes may still leach chemicals into your food, especially when exposed to heat or acidity.

“Prolonged exposure to moderate heat can cause toxic chemicals to leach from plastics,” says Jenna. “However, limited exposure such as straining food is less likely to cause chemical leaches. The heat from a microwave has been shown to be most damaging to the release of nano and microplastics. This study found that plastic containers exposed to 3 minutes in the microwave released 4.22 million microplastic particles and 2 billion nanoplastic particles per square centimeter from the container.”

Jenna also notes that it’s not just heat that matters. “Acidity can also affect the release of BPAs and phthalates into our foods and whilst BPS is a slightly better alternative, when combined with heat, it’s also high risk for contaminating our food too.” In short, ‘BPA-free’ isn’t necessarily super clean. If you’re heating food in plastic (especially in the microwave or with acidic ingredients like tomatoes or citrus), it may be time to rethink the materials you’re using…

What about metal alternatives?

Switching from plastic to materials like stainless steel or aluminium is often seen as a safer move - and in many cases, it is. But it's worth flagging that even metal cookware and appliances aren't entirely ‘risk-free’.

“There are some albeit less health concerns related to metals when compared to plastic, however, there are still some concerns,” says Jenna. “Stainless steel contains chromium and nickel, both of which can leach into our foods under certain conditions. Some research has also found a range of metals were released in response to cooking with aluminium cookware and that the duration and intensity of the heat significantly affected the types and the amount of the metals released. From a health perspective a build-up of heavy metals in the body can contribute to impaired neurological health, DNA and enzyme damage and increased stress on vital organs such as the liver and kidneys.”

This doesn’t mean you need to ditch stainless steel entirely… far from it. In most everyday use, it’s still considered a safer and more durable option than plastic. But if you're cooking at very high temperatures or using older, worn-out cookware, it’s wise to be mindful of potential leaching - especially if you're dealing with scratched surfaces or acidic ingredients. For the safest results, stick to high-quality, food-grade stainless steel (look for 18/10 grade), avoid overheating, and replace any damaged or heavily worn items. 

Why glass is the go-to smarter swap

If plastic is out and metal is a maybe, then glass is the real winner. It’s one of the safest swaps you can make in your kitchen as it’s naturally non-toxic, non-reactive and heat-safe. The result? No leaching, no chemical by-products, and no unwanted surprises - regardless of what you’re cooking, storing or reheating.

“Generally speaking, glass containers do not contain any plastics or chemicals and therefore they don’t release toxic by-products into your food,” explains Jenna. “However, it’s always important to double check what you’re purchasing as some glass containers are coated in plastic or other chemicals.”

When compared with plastic, the difference is stark. Plastic can warp, scratch and degrade over time especially when exposed to heat, oils or acidic foods. This damage can increase the risk of chemical leaching. Glass, on the other hand, stays intact - albeit it does unfortunately smash with any kitchen mishaps. It doesn’t absorb smells or stains which is another bonus and it also doesn’t release anything into your food, no matter how often it’s used or washed. Another plus? Longevity. Unlike plastic, which often clouds, cracks or becomes brittle, good-quality glass can last for years making it a more sustainable option too.

When it comes to heat, pressure and acidic ingredients, glass performs exceptionally well from a safety perspective too. Jenna adds, “Glass is ideal; however, when compared to other materials (particularly metal) for performance, it can take much longer to heat as it’s a poorer conductor of heat. However, this is just a price to pay for a healthier outcome. Glass doesn’t react to acidity and is therefore considered safer than metals and plastic. Some metals such as chromium and nickel can leach into highly acidic foods.”

If you want the most durable version, look for borosilicate glass.“Regular glass has a higher coefficient of thermal expansion than borosilicate glass,” explains Jenna. “This means it’s much more susceptible to breaking or smashing in response to changes in temperature. Borosilicate glass is made from boric oxide and is much stronger than regular glass. It can also withstand higher temperatures and is less likely to break in the dishwasher too. Whilst both types of glass are non-toxic, borosilicate glass is often more preferable as it’s likely to last longer.”

What about the environmental impact of glass over plastic?

When it comes to materials that are better for the planet, glass clearly has the edge over plastic. While glass production does require more energy upfront, its longer lifespan means it doesn’t need replacing as often. As Jenna points out, “Plastic production has a much greater carbon footprint than glass. Plastic quickly becomes unusable and therefore contributes to landfill waste much sooner.” Switching to glass not only reduces your exposure to harmful chemicals but also helps cut down on plastic waste too.

How to spot and switch to safer glass kitchenware

Sold on the benefits and ready to ditch the plastic in favour of glass? It all starts with knowing what to look for. “Try to avoid plastic (or plastic coated) items. Where possible look for glass (specifically borosilicate glass) and if you’re using stainless steel products, try to opt for those which are nickel free,” says Jenna. “When you notice your equipment is scratched, chipped or damaged then it’s time to replace it.”

Go for glass blender jugs, kettles and borosilicate storage containers and look for stainless steel bowls and utensils. For food storage, silicone or beeswax wraps work well instead of plastic. Proper care also matters. Avoid microwaving or dishwashing plastic containers and don’t store oily, acidic, or hot foods in plastic. Reusing single-use or damaged plastics is also a no-go.

If you’re wanting to confirm your glassware is genuine and not coated, Jenna suggests assessing the product specification document. “This should highlight which materials are in the product. If you’re unable to get access to this, try using your senses such as your sight and sound. Tapping glass will produce a clear ringing sound, it’s often heavier than plastic and under normal room conditions it’s cooler to touch than plastic. Finally, try scratching the surface, plastic will scratch much more easily than glass.”

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