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Jar Openers

What We Learned

A well-designed jar opener can eliminate the pain and frustration of trying to pry open stubborn lids. We rounded up seven models priced from about $6 to just under $20 and tested them on jars of all shapes, sizes, and materials—from 2-ounce vanilla bottles with tiny plastic lids to 26-ounce jars of tomato sauce with large metal lids.

Basic versions resemble silicone potholders—s...

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