The weather is warm, and barbecues and pool parties are happening in many backyards. There are plates filled with saucy ribs and buttery corn on the cob, and one of my summertime favorites: sweet, ...

Hint: It’s not plastic wrap. It’s no secret that watermelon is one of the best parts of summer—but it is notoriously difficult to keep fresh. The longer a cut watermelon is exposed to oxygen, the more ...