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Solve the Problem of Glass Rings With Math Coasters

by Alisha K.
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No one likes the ugly sight of a condensation ring on the coffee table. This is a problem. Thankfully, there’s a solution, and it’s full of math.

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These coasters will match perfectly with your number lamp and your equation bookshelf, so long as all you care about is, uh, math.

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The math coasters, which are available in a variety of classy colors (as pictured above), are sold in sets of five for $22. Numbers are, unfortunately, not included. It’s Etsy, though… if you search long enough, you’ll probably find something to complement your coaster set.

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