Science behind Portable Water Purifier

We have run meticulous laboratory tests to ensure our UV Light in our portable water purifier makes water from ANY source (free of debris) 100% safe to drink. See the full lab report here.

CrazyCap uses advanced 278nm deep UV LED to effectively sterilize water. See the charts above showing a significant reduction of bacteria in the contaminated water in both Normal and Crazy Mode Sterilization. The spectrum (260nm to 280nm) of light is found to have maximum disinfection capability.

Thanks to the recent development in LED technology, this special spectrum of light can now be produced without using toxic Mercury. When the Deep UV light enters the microbial cell, it destroys the active core (nucleic acids). Cells without the active core will no longer be viable.

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CrazyCap 2 -Cap Only
CrazyCap 2 -Cap Only
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Paul S - 11/08/2019

My son is very in to cleaning germ around him but when is came to water he was struggling because his s'well battle was smelly and there was a lot of mold. So I bought him this crazy cap for his birthday and he is loving it it's so simple to use even a 2 year old could understand let's go crazy cap let the world now you Exist because there are a lot of kids out there that are looking for such a product

Perfect cap for clean water on the go


CrazyCap 2 -Cap Only
CrazyCap 2 -Cap Only
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John - 11/04/2019

After going through like 5-10 bottle's this one stands out the crazycap keeps my bottle clean and I don't need to scrub it for a long time plus it makes sure that my water is safe to drink at all time, if you drink a lot of water like me I would recommend you this cap for your bottle it's just so simple to use. Thanks the crazycap team

Finally found what I was looking for


CrazyCap 2 -Cap Only
CrazyCap 2 -Cap Only
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Miri - 11/02/2019

I fly a lot for business and I always need water and till now I was struggling on getting with having clean water when going to different Countries. Now I was looking for the good bottle and I bought this crazy cap and I am using it already for 2 weeks and I am loving it so far it make me have clean water where ever I go thanks crazycap team for this amazing product

The perfect bottle for my business trips


CrazyCap 2 -Cap Only
CrazyCap 2 -Cap Only
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Mateo F - 10/31/2019

Cap fits my chilly's bottle perfectly. Self-cleaning works great. I have tried some other brands as well, but so far this is my favorite. I my friend gifted in LARQ bottle but it smells. So I looked online, and I found this Cap. I gave it a try, and I have to say this totally works. I am giving this a 4 stars because after letting my bottle sit for a long time, auto-cleaning shuts down to save power, which might again cause moldy smell build up. So when this happens, empty the contents and sterilize the bottle in Crazy mode, and the smells disappear. I am not sure this is because of my bottle or the cap because I am a bottle from a different brand. Also, the CrazyCap replacement cap eliminates the need for buying bottled water, especially when you are traveling to Mexico or any other country where water is questionable. Give this a try its; I am sure you guys would love it.

Fits my chilly bottle, and eliminates mold built-up


CrazyCap 2 Bottle
CrazyCap 2 Bottle
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Elena S - 10/19/2019

I bought these as gift as I loved mine. Very cool design and slick finish but seems delicate. I drop mine one and there is already a dent. So don't drop it.

Cool design and super tiny.


CrazyCap Bottle (Gen 2)
CrazyCap Bottle (Gen 2)
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Asif - 10/17/2019

Excellent customer service.

Excellent customer service


CrazyCap 2 Bottle
CrazyCap 2 Bottle
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Mohika A - 10/15/2019

Very easy to use. Love the simplicity.

Easy to use. love it.


CrazyCap Bottle (Gen 2)
CrazyCap Bottle (Gen 2)
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Gloria S - 10/15/2019

Great quality. Love the bottle and the cap. I prefer wider color options

Love the cap.


CrazyCap Bottle (Gen 2)
CrazyCap Bottle (Gen 2)
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Michael B - 10/12/2019

Quality is great. And I love the packaging

Great Quality.

Company Response

Hi Michael,

We really appreciate your feedback. 

If there is anything else we can do to help, please let us know. 

CrazyCap Team


CrazyCap Bottle (Gen 2)
CrazyCap Bottle (Gen 2)
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Mateja T - 10/12/2019

Happy with the purchase. But product took 3 weeks to arrive in Singapore

International shipping is super slow.


CrazyCap Bottle (Gen 2)
CrazyCap Bottle (Gen 2)
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Pradeep S - 10/05/2019

I charge it until it turns green, it will not turn on. I put it back on the charger, and it goes to charging again, full a full cycle again. Rinse repeat. Never turns on. Every time it shows fully charged, it will not turn on, and it acts like it is completely drained of battery.

Does not hold a charge


CrazyCap Bottle (Gen 2)
CrazyCap Bottle (Gen 2)
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XavierP - 10/02/2019

Using Gen1 Cap for more than two months and its awesome. But Gen2, bought recently, more powerful and compact. Nice!!

Great Product


CrazyCap 2 Bottle
CrazyCap 2 Bottle
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Enmanuel - 10/01/2019

I have tried this bottle cap on my other moldy smells bottles. In two crazy mode cycles, the moldy smell totally eliminated. I could not believe it. This UV technology is impressive. You have to tried it believe it ?

Best self-cleaning bottle


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