The best kettles for reducing microplastics: Reduced plastic and non-toxic options

Why your kettle material matters more than you think

Most of us use our kettle several times a day without giving it a second thought. But every time you boil water, the materials inside the kettle are exposed to temperatures of around 100°C.

Although scientists are still working to understand exactly what long-term exposure to microplastics means for human health, there is already enough evidence to justify reducing unnecessary exposure where it's easy to do so.

What most people want to know

Are glass kettles better than plastic kettles?

Generally, yes. Borosilicate glass doesn't rely on plastic surfaces being repeatedly exposed to boiling water, although it's still worth checking whether the lid, filter or other internal parts contain plastic

Is stainless steel safe?

Yes. Food-grade 304 (18/8) and 18/10 stainless steel have been used safely in food preparation for decades and are among the materials we recommend most often.

Are BPA-free kettles enough?

Not necessarily. BPA-free only means the plastic doesn't contain BPA—it doesn't mean the kettle is plastic-free. If reducing plastic exposure is your goal, look for kettles where water mainly contacts glass or stainless steel.

Does boiling water release microplastics?

Studies have found that some plastic kettles can release microplastic and nanoplastic particles into boiling water. While scientists are still researching the long-term health effects, many people choose glass or stainless steel to reduce this potential source of exposure.

Should I replace my plastic kettle?

If it's damaged, scratched or showing signs of wear, replacing it is sensible. If you're buying a new kettle anyway, choosing one with a glass or stainless steel interior is a simple upgrade.

How to choose a healthier kettle

The kettle you choose can make a difference to what comes into contact with your drinking water every day. While no product is perfect, choosing simpler, well-understood materials is one of the easiest ways to reduce unnecessary exposure to plastics and create a healthier kitchen.

Choose glass or stainless steel where possible

Look for models where boiling water mainly comes into contact with borosilicate glass or food-grade stainless steel. These materials have been used in food preparation for decades, are durable, and don't rely on plastic surfaces being repeatedly exposed to boiling water. They also make it much easier to see exactly what your water is touching.

Look for food-grade stainless steel

Not all stainless steel is the same. Where manufacturers disclose the specification, look for 304 stainless steel (18/8) or18/10 stainless steel. These grades ar widely used in high-quality food and drink equipment because they offer excellent corrosion resistance, durability and long-term perfomance. We also favour brands that are transparent about the materials they use.

Check the whole water pathway

Don't just focus on the kettle body. The lid, spout, filter and other internal parts may also come into contact with hot water. The best kettles minimise plastic throughout the entire water pathway.

Keep it simple

The healthiest kettles are often the simplest. A borosilicate glass body or food-grade stainless steel interior, with minimal plastic in contact with boiling water, is usually a better choice than complex designs or bold marketing claims. At KindCasa, we favour simple, durable materials that are well understood.

What KindCasa looks for

• Glass or stainless steel where water touches
• Food-grade 304 or 18/10 stainless steel where disclosed
• Minimal plastic contact with boiling water
• Transparent manufacturers
• Strong build quality and reliability