UPDATE: I have officially tried a few more flavors and the Grape is my favorite.... So far! I ordered a box of the ice tea, pink lemonade, orange cream, berry and citrus. With these tubes I found myself experimenting with the flavors using only half a tube, I enjoy the flavor when its not so strong. So I can get double the use out of one tube. I love the plastic, easy to open tubes. I can just toss one in my backpack without having to worry its going to bust open or get punctured and make a mess in my bag, like the crystal light packages. The lid clips shut nicely, since I only use half a tube its nice to be able to just toss it back in my bag. I have one everywhere I go. I have only tried 4 out of the 11 flavors. But you best believe I will be trying them all.

I have only tried one of the flavors, blueberry/raspberry, and I love it. A friend told me about them when I told her I was looking for something else flavorful to drink since I don't drink pop or energy drinks anymore. She asked if I had heard of Zipfizz and I was so baffled that I had never heard of these before. I have only used them for two days now and I can see the difference in my energy and my alertness. I am a third shifter and sometimes it is hard to stay awake. Not with these, they give me a huge burst of energy and I can get thru an 8 hour shift, no problem. I cant wait to receive my box and try all the flavors Zipfizz has to offer.

Not only does it give me the energy I need to get thru my day/night, it also has most of the vitamins I take every morning after work and then some. You cant really go wrong here, in my opinion. I love the energy Zipfizz gives me to be motivated to actually do stuff. Will be buying again. and again. and again, and again!!! Thank you!

30 tubes for about $30 about $1 per drink
100mg of caffeine (more than Mountain Dew (except for Game Fuel flavors)
Better tasting (in my opinion) than Monster or Red Bull (I cycle through each flavor, Grape, Fruit Punch, Orange, and am excited for each flavor )
Only 20 calories (way, way less than most caffeine sources (most pop with similar caffeine content have about 14x more calories/Monster has 2 servings per can, so the calories listed on the front of the can are doubled (because no one I have EVER met only drinks half of a can))
No sugar

Mix into a 'normal' sized water bottle that is filled to the top of the bottle's label, shake, drink.

This is a healthy(er), cost efficient source for caffeine. I would and do recommend it to pretty much everyone.

I like this product and have one almost everyday. I'm giving 1 star because they jacked up the price by $7, a 25% mark up in one month. Not going to buy this again.

I love this stuff. Started walking 3-5 miles a day. I drink this about 30min prior and find that I walk further and have more energy. since dieting and walking I have lost 40lbs and I attribute some of this to the energy I gain when using this product. No crashes like redbull or 5 hour energy drinks. Seems like it is better for you than the other energy drinks. Other review say they don't like the taste, I disagree. I put a bottle of water in the freezer for 20-30 min just enough so the water begins to freeze. The orange taste like a creamsicle. The colder the better.

This is truly a Great product.
Its provides that energy that you can really feel. B12 and vitamin C boost supercharged.
I've tried all the other stuff and found them useless.
It taste okay...but be warned this is not a beverage for sipping and relaxing, its a energy drink with NO sugar, so don't expect much, some of you folks expect it to taste like fresh squeezed lemonade.
My use is basically getting a morning and late afternoon energy boost and getting C and B12 in my body.
I notice the difference immediately.
I find it improves your mental alertness more then physical strength.
I work a grave yard shift and when I feel my mind out of focus, I drink this and Bam, right back on track again.
Much better then coffee, my old energy booster.
So, if you need a boost to get you going, and you don't want to put all sorts of krap in your body, give this a shot.
Best flavors grape, black cherry, orange and fruit punch.
Grape is my favorite.