15 Foods That Help You Stay Hydrated

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Cucumber

Water content: 96.7%

This summer veggie—which has the highest water content of any solid food—is perfect in salads, or sliced up and served with some hummus, says Keri Gans, RD, author of The Small Change Diet: 10 Steps to a Thinner and Healthier You and a consultant to Mindbloom, a technology company that makes life-improvement apps.

Want to pump up cucumber's hydrating power even more? Try blending it with nonfat yogurt, mint, and ice cubes to make cucumber soup. "Soup is always hydrating, but you may not want to eat something hot in the summertime," Gans says. "Chilled cucumber soup, on the other hand, is so refreshing and delicious any time of year."

Next: Iceberg lettuce