Amazon has a 30% off coupon on C4 Original V2 30 serving for Fruit punch, Pink lemonade, icy blue razz, and Strawberry Margarita. Stacks with "New Year, New You" promotion.
Clip coupon and subscribe to 2x the item and the prices with 5% S&S coupon will be before taxes:
Pink Lemonade: $21.99
https://www.amazon.com/dp/B01N38M…yAbYR
Fruit Punch: $27.42 https://www.amazon.com/dp/B01N272…yAb1G
Strawberry Margarita: $27.45 https://www.amazon.com/dp/B01NAXW…yAbFK
Blue Razz: $28.95 https://www.amazon.com/dp/B01N25B…yAbAQ