Just when you thought the C4-series couldn’t get any better, Cellucor adds the C4 Original Carbonated ready-to-drink pre-workout to the mix. This is not just a regular energy drink. Just like the original pre-workout powder, this drink contains premium ingredients like citrulline, beta-alanine and caffeine (200mg). The only difference is that it’s canned and carbonated. That means you can now enjoy the famous C4 pre-workout drink wherever you go.