Rye Crispbreads
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With 2 g of fiber per slice and made from 100 percent whole rye, these are the ultimate whole-grain cracker. They go soggy if they're in contact with moisture, so keep them packed separately. Look for Ryvita or Wasa – the two major brands you've probably seen.

Sugar content: 0 g
Fat: 0 g in the plain variety; 1 g per slice in the sesame rye crackers from those healthful little seeds.
Other: Despite being only 40-45-calories per slice, the 2 g of fiber makes this cracker filling. They're also really low in sodium (35 mg/slice).

Where to get it: Supermarket