Zym electrolyte tablets have reformulated all flavors to use the all-natural sweetener Stevia, and they’ve added a new Grape flavor.

Grape joins Berry as a caffeinated option with 100mg per serving. Lemon Lime is the standard, and Orange Rival adds Rhodiola Rosea, an herb that supposedly boosts energy and reduces fatigue. The latter two are my personal favorites and among the better tasting electrolyte tabs I’ve tried (GU’s strawberry lemonade is the other). The new Grape flavor’s decent, though the caffeine’s bitterness is apparent on the first few sips. Tubes of 10 retail for $7.99 to $9.99. Check ’em out at GoZym.com.

What do you think?