Amazon has the 15-Count BODYARMOR Flash IV Electrolyte Packets (Grape) on sale for $9.03 - 20% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $6.77 with free shipping on $35+ or with Prime. About 45 cents per packet. 

• Zero sugar, 15 calories, 2,230mg of electrolytes per stick