Amazon [amazon.com] has
C4 Performance Energy Drink Cosmic Rainbow, Zero Sugar Carbonated Preworkout Energy, 200mg Caffeine with Beta Alanine, 16 Fl Oz (12 Pack), Packaging May Vary, 16 Fl Oz (Pack of 12) on sale for
$23.49 - 40% off via Subscribe & Save (5% base + 35% coupon) =
$14.09.
As always, these coupons are
YMMV due to them often being single-use only.
Deal Info:- Current price: $14.09
- About 41% below my observed 90-day average price of $23.81
- About 40% below my observed 180-day average price of $23.63
- About 61% below my observed highest tracked price of $35.88
- Within 10% of my lowest observed Amazon price of $16.00 on Dec 14, 2024
- Why it stands out:
This is meaningfully below my observed average Amazon price.
- Customer rating:
4.6⭐ from 3,815 reviews
- As of May 23, 2026. Price and availability may change.
Features:- ENERGY TO OUTPERFORM - Formulated with 200mg Caffeine to support explosive energy and physical performance when you need it most whether it's in the gym, on the field, in your home, or wherever your fitness journey may take you
- INCREASE REP COUNT and HYDRATION - Formulated with CarnoSyn Beta-Alanine, a premium clinically studied beta-alanine, studied to support muscular endurance and fight fatigue, and BetaPower Natural Betaine that supports muscle cell hydration and physical performance
- INCREDIBLE FLAVOR - Enjoy fruity Rainbow Candy flavor with zero sugar or carbs with no artificial colors or dyes.
- NEW Cosmic Rainbow flavor, you get your candy fix with zero sugar, zero carbs, and no artificial colors or dyes. Now that's a fruity, and delicious way to outperform and overachieve.
- PACKAGING MAY VARY: Old Flavor Version is "Skittles" and New Flavor Version is "Cosmic Rainbow"
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