It can be hard to stay well-hydrated.

“We naturally get some water from what we eat,” says Maples.

Watermelon (1 cup = 5 oz.

Watermelon, Cucumber & Feta Salad

(Find our favoritehealthy watermelon recipes here.)

Apple (1 medium = 5.5 oz.

Serving size matters too, kids.

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Tomato (1/2 cup = 3 oz.

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Not only are tomatoes at their in-season best during summer, they’re also 94% water.

And we’re convinced the other 6% is pure flavor.

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Baked potato (1 medium = 4.5 oz.

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Yup, the humble spud is three-quarters liquid.

Kidney beans (1/2 cup canned, drained = 3 oz.

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Few foods are healthier than beans.

These plant-based proteins have antioxidants, fiber and iron, among other nutrients.

And they’re all stewing in a water bath, even after you’ve drained them.

Drink-er, eat up!

View Recipe:Bean Salad with Lemon-Cumin Dressing

6.

Yogurt (1 cup fat-free vanilla = 6.8 oz.

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Everyone’s favorite dairy food has more than just protein and probiotics going for it.

It’s also thirst-quenching.

(Kefir and packaged yogurt smoothies have more liquid, but beware of added sugar.)

Cooked brown rice (1/2 cup = 2.5 oz.

View Recipe:Easy Brown Rice

8. can, drained = 2.3 oz.

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Water-packed tuna really is-even without accounting for the water it’s packed in.

Plus, it’ll get you some omega-3 fatty acids.

Just be carefulnot to overdo it, since tuna can have high levels of the toxin mercury.