In the basement of his building, the high water mark of four feet - like a bathtub ring - circled the walls.

Magnesium stearate is a major component of "bathtub rings."

The "bathtub ring" records the water level less than a decade ago.

The bottom of the tub was gritty with flaked-off bathtub ring.

I was also thinking about the Drinkwaters' bathtub ring, and what to do with the comic book I'd found behind the toilet.

Our babysitter/ housekeeper quit because the bathtub ring had rings after Madalyn gave our dog a bath.

Canyon walls are plastered with a chalky white bathtub ring of calcium carbonate 10 stories high, where the water once reached.

To everyone's surprise, the bathtub ring is disappearing rapidly.

The bathtub ring is white because of the deposition of minerals on previously submerged surfaces.

A white bathtub ring has built up from the boron.