SALTT electrolyte packets get a rare 20% discount on Amazon for Prime Day

Amazon is running a rare 20% discount on SALTT Zero Sugar Electrolyte Packets today or while supplies last, bringing a 30-stick box down to $31.20 from $39. Prime members who opt into Subscribe & Save can bring the price to $29.64, though SALTT's listing notes that discount only applies once a shopper has five or more active subscriptions, unlike typical Subscribe & Save orders.

Each stick is formulated with sodium, potassium and magnesium to replace what's lost through sweat, and the packets come in 14 flavors with no added sugar. The brand markets them for workouts, hot weather and travel.