Cafe Brew Glass Tea Kettle, 12 Cup, German Borosilicate Glass, Gas & Electric Stovetop Safe, Whistles at Boil Review (2026)

Who this kettle is for

The Cafe Brew kettle fits a household that already cooks on a gas range, a standard electric coil, or a glass and ceramic cooktop, and wants a stovetop kettle rather than an electric one. At 48oz, sized for about 12 cups measured at 4oz servings, it holds enough for a small pot of tea or several mugs of coffee without refilling mid session. The clear borosilicate body lets anyone watching the stove see when the water is moving toward a boil, which some cooks prefer over a closed metal kettle. It is not the right choice for a kitchen with an induction cooktop, since glass has no magnetic base for that heating method, and it is not meant for ovens, microwaves, or outdoor grills.

Materials and what is included

The body is made from laboratory-grade German borosilicate glass, a material chosen for its resistance to thermal shock on direct stovetop heat, and the kettle is BPA-free and lead-free. It ships with a metal heat-diffusing trivet, which is required when using the kettle on an electric coil burner to spread heat evenly across the glass base and avoid a hot spot. The lid is built with a whistle mechanism that sounds once the water reaches a boil, so there is no need to stand at the stove watching for steam. On a gas burner the flame should stay within about 3.5 inches at medium heat, and on electric the trivet keeps the glass off a burner up to roughly 5.6 inches wide.

Using it day to day

Fill the kettle to at least 24oz before heating, since the maker warns against letting it run dry or boiling out completely, which risks cracking the glass from uneven heat. Once water reaches boiling, the whistle gives a clear audible cue, useful for anyone who tends to step away from the kitchen while water heats. Because the body is transparent, mineral buildup from hard water becomes visible over time as a cloudy film along the waterline, which is a normal sign to plan a cleaning rather than a defect. The handle is designed to stay cooler than the glass body, though anyone lifting it off an active burner should still use a towel or mitt as a precaution around the neck and lid area.

Care and cleaning

The kettle is listed as dishwasher safe on the top rack, though hand washing with a sponge or soft plastic pad and soapy water is the gentler option for glass that sees daily stovetop heat. For mineral scale that builds up from repeated boiling, the maker recommends a liquid descaler rather than scrubbing the deposits away, since abrasive scrubbing can scratch the glass surface and weaken it over repeated heat cycles. Avoiding steel wool or other rough pads keeps the clear body looking clean rather than clouded with fine scratches. Regular descaling based on local water hardness keeps both the boil time and the kettle's appearance consistent over years of use.

Trade-offs and verdict

Against stainless steel stovetop kettles, which dominate this category, the appeal of glass is watching the water and avoiding any metallic taste some people notice from steel, at the cost of needing gentler handling around a hard stove grate and no induction compatibility. Anyone whose kitchen is built around an induction range should look at a steel kettle with a magnetic base instead, since this glass body simply will not heat on that type of burner. For gas, electric, or glass cooktop kitchens where a visible, whistle-equipped kettle sized for a small group appeals, this is a straightforward, classic option with clear German glass and a trivet included for electric use.

Frequently asked questions