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The CrazyCap bottle has two water purification modes: normal mode and "crazy mode." According to CrazyCap, normal mode kills up to 99.99% of contaminants and is suitable for "low to medium contamination," such as from public water fountains and tap faucets. Crazy mode, on the other hand, kills up to 99.9996% of contaminants and is suitable for "medium to high contamination," such as from lakes and rivers. The normal purification cycle takes 60 seconds and the crazy purification cycle takes two and a half minutes.
The CrazyCap also has an autoclean function, which turns on six times per day for 20 seconds. CrazyCap says this periodical exposure to UV-C light prevents microbial growth and odor, and it seems to work. After three days of use, I didn't notice any smells or films inside the bottle. Additionally, purified water from the CrazyCap bottle tasted significantly better than water from the tap faucet.
The CrazyCap bottle is more slender than the others on this list, which I liked. It fits into my car cup holders, as well as the mesh cup holders on my gym bag and backpack. It's a bit taller than the Larq, so you might have trouble fitting it in the top rack of your dishwasher.
Personally, I think the best thing about CrazyCap is that you can buy just the cap, which according to the website fits on many different water bottles, maybe something you already have.
On a single filtered water bottle charge, the CrazyCap will last up to two months, but only if you leave it to autoclean. Manually starting the self-cleaning water bottle purification cycle affects that charge time, though CrazyCap doesn't specify by how much.
Truthfully, all of these water bottles did a great job of keeping themselves clean. After three days of drinking and constant refills and no hand-washing, none of these bottles smelled musty or had any sort of film on the inside, two things my normal steel bottle often produces.
The Larq and CrazyCap use UV-C light to zap all of the major waterborne pathogens; they're all stainless steel water bottle options (no cheap plastic water bottles here), and all these best self-cleaning bottle choices have automatic cleaning cycles. On top of that, all are easy to use and they all have battery notifications so they'll never die without warning.
I had virtually no complaints about any of these self-cleaning bottles, and if you're looking for an aesthetically pleasing bottle that purifies your water, any of these will get the job done.
The Larq and the CrazyCap both have two modes so if you plan on using your self-cleaning water bottle with outdoor sources of water, these can be great options since they have overdrive modes that kill even more microorganisms.
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Self-cleaning water bottles use UV-C light to kill bacteria, viruses, protozoa and other microorganisms by destroying their DNA. The UV light sterilizes both the water in the bottle and the interior surface of the bottle.
UV-C light serves as a convenient, mostly hands-off way to keep reusable water bottles clean without the need for chemicals or soap. Most self-cleaning water bottles, including the ones covered in this article, also have all the features you'd look for in a normal reusable water bottle: They keep steaming hot water hot and cold water cold (or room temperature water at room temperature), and they're durable.
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I tested three UV-powered self-sanitizing water bottles -- the Larq bottle, the CrazyCap bottle and the Mahaton bottle (which is on Kickstarter, but is fully funded and already shipping products) -- using the tap water from my apartment's kitchen sink (my preferred water source).
I usually don't buy bottled water, and I don't have a faucet water filter, so I often drink this water unaltered. I thoroughly cleaned each bottle and charged them overnight to ensure they were ready for testing. Then, I used each bottle for three days in place of my normal reusable bottle.
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You should consider six important factors when choosing a UV-powered water bottle: Purification, taste, design, ease of use, capacity and battery life. If you decide to purchase a self-cleaning water bottle, you'll want one that kills as many microbes as possible, produces a good taste, is easy to hold and transport, and lasts for a decent period of time on one charge.
1. Purification: What does the bottle promise to get rid of, and at what percentage? Also, how long does it take for the bottle to purify the water? Is there an auto-clean function? I also considered how the bottle smelled and looked on the inside after three days of use.
2. Taste: How does the water taste after going through the purification cycle, compared to my drinking water?
3. Design: What is the bottle made of and how convenient and easy is it to carry around? Does it keep water cold?
4. Ease of use: How easy is it to set up the bottle for first use, clean it and store it?
5. Capacity: How much water does the bottle hold? Will you be refilling it constantly, or will the pure water last you a while?
6. Battery life: How long does the bottle last (and how many cleaning cycles can it complete) on a full charge?
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Source: cnet.com