Select Prime Members: 13.65-Oz KEY NUTRIENTS Electrolytes Powder (Lemonade) $12 w/ S&S + Free S&H

Amazon is selling the Lemonade flavor of Key Nutrients for $12 with Subscribe & Save. The regular price is ~$11.99 plus tax after clipping the $15 off coupon. Other flavors are also on sale with clippable coupons and Subscribe & Save, but prices will be slightly higher and vary depending on the flavor you choose. Taste is subjective, but most flavors are very good, and the nutrient profile is good compared to the competition with not a lot of sodium.