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Adjustable Electric Kettles

You could boil water, let it cool, and check with an instant-read thermometer for the perfect cup of tea—or let technology do it for you.

What We Learned

Tea connoisseurs know that lower water temperatures (from 165 to 195 degrees, rather than 212 degrees, or boiling) mean a better brew; similarly, water between 195 and 205 degrees will produce a fuller-bodied, less bitter coffee. While you could boil water, let it cool, and check with an instant-read thermometer, a new breed of electric kettles designed to bring water quickly to a r...