Anyone who's spent any time watching Food Network or studying cooking knows that the ThermoWorks ThermaPen is basically the be-all, end-all of instant read digital food thermometers. The problem is, they cost about $100, and hardly ever go on sale. Today though, you can get a green model for $79 to celebrate St. Patrick's Day. That's still a hefty investment, but it's about as cheap as these things get. [Green ThermaPen, $79]

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