$18.03 for Quest Coffee Protein Shake, down from $28

Amazon has the Quest Nutrition Ready to Drink Coffee Protein Shake for $18.03 when combining a $3.21 coupon and 20% off through Subscribe & Save.

This price reflects a $10.97 discount off the original $28 list price, representing a 39% reduction. The deal is further enhanced by free shipping with Prime or on orders over $35.

To redeem, go to the product page, clip the $3.21 coupon, select Subscribe & Save to clip the 20% discount, and proceed to checkout. The total price should be $18.03.

This deal is notable due to the high percentage discount and the savings compared to the original retail price, especially considering the convenience and popularity of the product for keto and low-carb diets.