I received the Crazy Cap 2 at no cost for an honest review. First and foremost, it's important to understand what this device is: It is a bottle with a cap that has a UV light that illuminates and kills 99.999 percent of bacteria and viruses. It works because this type of UV light alters the genetic material in bacteria and viruses, and renders them dead. What does it NOT do? This device does NOT remove odors, sediment, hardness, minerals, and does not include any sort of filtration. With that being said, The Cap charges through a USB cable and can also be used to illuminate any surface (not skin) and kill bacteria and viruses on them, by slowly shining the UV throughout whatever it is you are sterilizing. For example, you could take the cap and turn it on, and slowly hover it over your phone to kill bacteria and viruses. The bottle holds 17oz/500ml, and is of aluminum. The Cap is also aluminum. The Crazy Cap 2 is not dishwasher safe, and the warning label on it says "content temperature must not exceed 130 deg F" Basically, don't try to boil water in the cap and you should be ok. Also, don't pour scolding tea inside of it. What does this do? It allows you to remove microbes from water and ensure you don't get some bad water poisoning via a bacteria/microbe/virus. This will not lower your water hardness, and it will not alter taste, so keep that in mind in case you're taking it hiking and plan to drink from a natural water source. However, for survival purposes, it's practical. The cap has different LED colors to indicate its charge level, so that was a handy feature. I used the cap multiple times in one day, stored it for 5 days or so, and then the battery needed to be recharged. I think this device performs well (though I wasn't able to test the virus levels or any real "before and after" tests), but I am going by what I know about UV lights and their effect on water. On those grounds, this is a practical bottle/cap, I think it has potential to do even more, and I commend CrazyCap for designing something that can ultimately save lives. I would characterize the CrazyCap 2 as more of a supplemental device along with some sort of filtration, to provide safe and good-tasting, sediment-free water. I wish it did have more features along those lines, but I do understand the costs associated with increasing features. I do recommend it, though please be informed of its capabilities and limitations when it comes to potable water.

Love my new crazy cap bottle. At first I was disappointed in the size as the bottle I usually use was bigger. Quickly I realized this size was perfect as I have increased my water intake as the bottle is not intimidating as opposed to what I used prior. Packaging is excellent. Opened the canister packaging it came in to find the bottle wrapped in a canvas type bag which was a nice plus and added to the presentation. Cap did not come charged so I plugged it in to charge it up which didn’t take long. At first I thought it was a push button and nothing would happen when I pressed the button but I quickly realized all that was needed was a light touch. Tap lightly twice for a one minute purification or tap five time for what they call Crazy mode which purifies with UV light for two minutes. I prefer using the crazy mode since I don’t trust the water in my area. Using Crazy mode does decrease battery life faster but I did get a couple of days use before I had to recharge which was not an issue. I tested to see if there would be any leaks when turned upside down. No issues there and the cap appears to be pretty solid. Overall I am very happy with crazy cap. I am drinking more water and feel like I am safer using the purification process. Now I need to get one for my wife because she keeps threatening to steal my bottle.

First off, let me say that this is a pretty cool device. Its packaging was attractive and secure yet still simple to open. Anyone who has ever had a Christmas morning trying to un-package some kids' toys knows exactly what a frustrating challenge that can be sometimes. Not here. A couple simple slices to the plastic tabs and the top popped right off. Inside you'll find the bottle, purifying cap, charger, instructions, extra gaskets and a cloth carry bag. The bottle itself is very "pretty" according to my wife and daughter. I have no complaints but I am not nearly as aesthetically keyed in as those two are. Operation was simple. Pop the charger on the cap and it charged in 20 minutes or so. It did come with some charge already in the cap. Tap the top twice and it does the normal cycle for about a minute, tap it 5 times and it does its deep cycle for about 2.5 minutes. Easy money. As for efficacy... I really don't know. We live in the foothills of the Rocky Mountains so our water is about as good as it gets right out of the tap. I am curious to see how it will fair this summer when we're relying on local water from various RV campgrounds around the country. My wife is a medical professional and they use the same technology in her day to day medical care of patients so I have no reason to believe that it does not work as advertised. The one area for improvement is pretty simple and admittedly one could accuse me of nitpicking, but I do wish the cloth pouch had a couple exterior pockets to hold the charger and spare gaskets. Not a deal breaker, just a nice to have. In all, pretty slick unit and I would recommend it to a friend.

I couldn't wait to open my CrazyCap 2 sterilization bottle. After watching a video showing how versatile the cap actually is, and the sterilization that it can do in just one minute for regular tap water and 2.5 mins for lake/pond water, I was really impressed. Opening the package, it contains the water bottle (you don't have to just use it for water), the CrazyCap 2 cap, a carrying bag, a USB charging cable, isopropyl wipes to clean the neck of the bottle, and instructions/quick start guide. The cap did not come charged, so I plugged it in right away and it took about 2 hours to charge. CrazyCap tout that you can do 5 sterilizations a day, 5 days a week on one charge, using the 'Normal' setting, less if you use 'Crazy Mode'. The cap is simple to use, once charged, screw it on the bottle (after filling with water), tap the touch sensitive button once to check battery charge, twice to initiate 'Normal' sterilization, or tap 5 times to initiate 'Crazy Mode'. Normal Mode sterilizes for 1 minute, using the UV-C LED housed inside the lid (Do not look directly into the light). The Crazy Mode sterilizes for 2.5 minutes. Both modes sterilize with a blue pulsing LED ring on top for the duration, and then a green ring pulses once when complete. It's recommended that you agitate the water gently in the bottle to completely sterilize it. CrazyCap 2 claims to achieve a 99.999% sterilization in Crazy Mode. I used regular tap water, filled up the bottle and took a taste. It had a chalky, slightly chlorine taste to it. After using Crazy Mode, I took another taste of water and it definitely tasted different. It was notably less chalky, and the chlorine taste had diminished, although the help section of the instructions does state 'Deep UV sterilization technology only eliminates microbial contaminants, not chemicals or particulates. Chemical and particulate matter needs to be filtered separately before sterilization'. CrazyCap 2 can also be used away from the bottle, to sterilize other items. You can turn it on, in either mode (Normal or Crazy) and sterilize your mouse, keyboard, phone, cutlery at a restaurant etc, by tapping the button twice, or 5 times, and running the UV-C light over the surface. Very handy if you wanted to make sure everything is germ free! You cannot put the CrazyCap in the dishwasher, but it does come with a 1 year warranty, and the UV-C LED is designed to last up to 10 years. The sterilization process is chemical-free. Purely done via UV-C light. The bottle can hold hot and cold liquids, it will keep cold contents cold for 24 hours and will keep hot contents hot for 12 hours. Overall, I'm impressed with the technology, the design, the style and the functionality of the product, especially because you can use it away from the bottle and sterilize other things beside just the liquid contained within. My only issue with the CrazyCap 2 was that the battery life didn't seem to meet the specs set out by CrazyCap. I filtered 2 bottles of water (one in Normal Mode, one in Crazy Mode), floated over my mouse in Normal Mode and my keyboard in Crazy Mode, and the battery life indicator turned orange, denoting 25-50% battery life. The following day, I filtered two more bottles of water and the CrazyCap maintained it's orange light. So my concern is that it won't last quite as long as suggested, but it isn't a deal breaker, as the USB charging cap is convenient and easy to use. Definitely an interesting and useful product!

The cap broke before I could use it. This costs almost $80!