VAULT Caffeine Free Brain Energy Drink – Nootropic for Mental Focus Sharpness Memory and Reaction Time – No Crash or Jitters – Sugar Free – 12 Fl Oz (Pack of 12) – Sour Watermelon + Tart Cherry Flavor

It's marketed as an energy drink, but really this is great for helping you study or stay aware throughout the day. Its more of a focus drink. After drinking one of these I could easily power through a few chapters of the books I've been meaning to read when before I'd have trouble just getting past 10 pages or so before I had to take a break. I've also been having one before work. I drive professionally and work long hours while listening to podcasts. It helped me stay attentive and I could easily focus on 10 hours of podcasts without feeling like I was starting to zone out and not be able to listen. They weren't kidding about it helping you sleep. After a few of these I could feel my sleep patters resetting and I've never had such a restful, deep sleep. It tastes great, if slightly salty. The packaging is my only gripe. It feels like a prototype and occasionally the wrap on labeling will tear near the mouth and poke you in the lips.

The flavor is overly tart for what I would like from a drink, especially the first sip. The flavor is good except for that. So if you like tart go for it. From an energy drink standpoint, it seems fine. No crash or jittery feeling but also no rush. It's a slow burn that is barely noticeable and persists for a while. It does help to combat caffeine crashes though so if I have 3 cups of coffee in the morning I'll grab one as I start to crash. Unfortunately, the flavor is hard for me to overcome so I am not sure I will be buying this again.

Vault is a product is different than any other product I have tried. It has no caffeine or sugar, but it tastes really good. It's BHB provides hours of energy for me every time I drink it. I survived Colon Cancer but have lymphedema that I manage. I have always been a very health-conscious person, but I definitely upped my game after Cancer and ingredients matter. The BHB also suppresses my appetite, so I end up with more energy and less hunger. No more occasional 5-hour energy drinks or red bull for me with all the sugar. And the price is reasonable when I take into account all the benefits and the costs of similar products. I will definitely be purchasing this again as my son likes it also.

Great idea but terrible taste I like the ingredients and how it makes me feel so I tried so hard to like it. They could take the flavoring down by 50% or more and it would taste great. The actual flavor is good just WAY too strong. Tastes like syrup.

Vault is a product like no other. It has no caffeine or sugar. It's BHB provides hours of energy for me every time I drink it. I no longer require coffee in the AM to get me going. And the BHB also suppresses my appetite so I end up with more energy and less hunger. I've now tried all the flavors and they all taste good. No more 5 hour energy drinks or red bull for me with all the sugar. And the price is reasonable when I take into account all the benefits and the costs of similar products. All in all, I am 100% satisfied with Vault and plan to keep on taking it - hoping that more flavors will be developed in the future.,

I was looking for an energy drink without the caffeine as I'm hopelessly addicted to caffeine. These had a very strong cherry flavor and did not have caffeine (or caffeine metabolites like some other "caffeine-free" drinks) as evidenced by my caffeine withdrawals after skipping out on my usual Monster. The energy feeling was pretty good from these, similar to some nootropic supplements. Make them less tart and much cheaper and I'd definitely buy again.

I quit drinking caffeine a about 2 years ago so i was looking for an energy drink to take with me on ling bike rides. This works, but maybe too good though. 5 minutes after drinking i could feel my energy level boosted but my heart rate was just as high as when i drink caffeine. Maybe it would be suitable for me if the can was half the size. If i find it in a small can I'll order again for sure. The taste it very sweet and extremely sour...very reminiscent of Sour Patch Kids candy.