Top Questions

CrazyCap fits 9oz, 12oz, 17oz, and 25oz cola-style bottles. CrazyCap does not fit 25oz bottles for brands other than CrazyCap.

CrazyCap fits the 15oz bottle of S’ip by S’well. The size of the cap is 34mm in diameter (measured at the bottom where it seals the bottle neck).

CrazyCap is compatible with a majority of cola-style bottle brands. The most popular brands include MIRA, Simple Modern, Aorin, S’Well, Manna, HoneyHolly, BonBon, LiveLifeLong, Inosu, SunSella, Sportsneer, Chilly's, as well as many others.

CrazyCap is also compatible with S'ip by S'well bottles.

If you have any more specific questions about compatibility with a specific brand, please email us at hello@thecrazycap.com.

LYT and CrazyCap (aka CrazyCap 2) are essentially the same product, from a technology perspective, but with a few cosmetic changes and price variations. 

Detailed differences between the two can be found in the link below (please scroll down on the page to review the differences).


Mellow, on the other hand, is a finished product style of the bottle for the CrazyCap line. 

The CrazyCap comes in three finish variations of stainless steel bottles, namely Solids, Patterns, and Mellow. Mellow is texturized and comes in different colors.

The nine mellow, or pastel, shades are made with ultra-soft, easy-grip coating. It's a super-smooth surface that's sweatproof, scratch-resistant, and easy to clean.

The dimensions of the 12 oz bottle is 2.8Lx2.8Wx8.75H; 17 oz is 2.8Lx2.8Wx11H; 25 oz is 3Lx3Wx12H

The deep UV-C LED destroys the nucleic acid within the DNA of microorganisms.We have compressed this UV technology into our bottle cap. The wavelength and power of the UV-C LED in your cap is set to a certain value to make sure we achieve maximum sterilization.

Yes, the LYT Cap will also fit your CrazyCap bottle.

How It Works

There is no ‘on’ or ‘off’ button on the cap. The self-clean mode is automatic and cannot be turned off.

Charging your CrazyCap is very easy. A port-less USB charging cable is included with your CrazyCap. Simply place the charger on top of the cap, and it will fully charge in 4 hours or less.

When the deep UV light activates in auto-clean mode, it shines the interior surface of the bottle to destroy mold, bacteria, viruses, and pathogens. Due to this process, your bottle will never smell moldy, so you never have to worry about keeping your bottle clean.

CrazyCap can be purchased with a 17 oz bottle, or a 25 oz bottle. We also offer handles and carrier clips in a variety of colors. 

Normal Mode is activated by tapping the touch sensor on the cap twice (UV is activated for 60 seconds). 

Click here to see the Normal Mode activation video.

Crazy Mode is activated by tapping the touch sensor on the cap 5 times (UV is activated for 2 minutes).   Click here to see the Crazy Mode activation video.

Tap the touch sensor once. The light ring will illuminate 1 of 3 colors:
Green light indicates >50% battery life
Orange light indicates 25%-49% battery life
Red light indicates <25% battery life

Step 1) Empty the contents of your bottle completely. 

Step 2) Screw the CrazyCap on to the bottle and treat the bottle two times in Crazy Mode (5 taps on the touchpad activates Crazy Mode)

Step 3) After two treatments, the odor should be eliminated significantly. If not, try Crazy Mode one more time.

Odor removal depends on how dirty the bottle was before the treatment. Note: CrazyCap's deep UV can only eliminate odor due to mold, bacteria, fungi, algae, etc., but not due to perishable contents used in the bottle. 

Once it is thoroughly treated, the bottle can be maintained odor-free with CrazyCap's automatic self-cleaning mode (activates every 4 hours for 20 seconds). To ensure your bottle surface is completely sterilized, perform sterilization on your empty bottle twice a day.

The product (CrazyCap) is expected to last a week on a full charge with 5 Normal Mode  uses daily (up to 7 days). 

A full charge is indicated when the light on the cap turns green after charging, and no charge is indicated when the cap stops responding to the touch and doesn’t show a light color.

No, the LYT plastic bottle is not insulated, and therefore, does not keep water cold or maintain the temperature of water.


On-demand sterilization purifies your water when you need it. Simply tap the touch sensor twice to activate Normal Mode (one-minute sterilization). Tap the touch sensor five times to activate Crazy Mode (two-minute sterilization).

Shining CrazyCap’s UV light on any non-porous surface can eliminate up to 99% of germs. You can expose up to 100 square inches of the surface during Crazy Mode (two-minute duration). The most effective distance for exposure to the surface is 4 inches.

When the deep UV light activates in auto-clean mode, it shines the interior surface of the bottle to destroy mold, bacteria, viruses, and pathogens. Due to this process, your bottle will never smell moldy, so you never have to worry about keeping your bottle clean.

CrazyCap uses a deep UV light spectrum (in the range of 278nm) to disinfect your water and bottle. This spectrum of light is proven to have maximum disinfection capabilities. Thanks to the recent development in UV LED technology, this special spectrum of light can now be produced without using toxic mercury.

When the UVC light enters the microbial cell and destroys the active core, i.e., nucleic acids, these cells will no longer be viable. Eventually, these dead cells convert into fundamental constituents such as CO₂, water, and trace elements (nitrogen, oxygen, phosphorous, sulfur, etc.)

CrazyCap's deep UV water purification is effective against bacteria, viruses, and pathogens. It prevents a wide range of waterborne illness by effectively killing 99.999% of germs from questionable water sources.

CrazyCap does not remove particulate matter and/or chemicals (such as fluoride/chlorine) from water.

The deep UV LED CrazyCap uses is 278nm, while the wavelength of visible light ranges from 400nm to 700nm. Therefore, the true brightness of the light is not easily visible to the human eye. 

The best way to see the deep UV light is through scattering. Point the deep UV light onto white printer paper in the dark room to see the intensity of the deep UV. CAUTION: Please avoid looking directly into the UV light beam.

No, CrazyCap doesn’t remove chemicals from water. A traditional charcoal filter is needed to remove chemicals from water. 

However, CrazyCap sterilizes your water and bottle up to 99.999%, killing bacteria, viruses, and pathogens that might be present.

CrazyCap is 99.999% effective in sterilizing the water, as long as it’s transparent and free from particulate matter. Please note: CrazyCap is not a filter.

We always recommend using Crazy Mode when using water from questionable sources.

Our caps were designed with a low power UV-C LED. Accidental exposure must not exceed 30 minutes per day, but strongly recommend avoiding direct exposure to the eyes at all times.

No, the liquid should be clear. The uv light cannot pass through turbid (non-transparent) liquid.

Yes, CrazyCap is an IPX7 certified waterproof cap.

Product care

When using it for the first time, we recommend washing your bottle with soap water. After that, the deep UV-C light activates in self-clean mode automatically, shining in the interior surface of the bottle to destroy mold, bacteria, viruses, and pathogens. This process sterilizes your bottle and keeps it mold and smell free, so you never have to worry about cleaning your bottle.

The CrazyCap is completely waterproof, so you can either wash the cap with mild soap and water, or clean it with alcohol wipes. Please note: The CrazyCap is not dishwasher safe.

The CrazyCap is completely waterproof, so you can either wash the cap with mild soap and water, or clean it with alcohol wipes. Please note: The CrazyCap is not dishwasher safe.

For this, we recommend activating the cap before putting it on the bottle mouth and shining the mouth surface for at least 30-40 seconds, or activating normal mode (60 secs) to disinfect this portion of the bottle.

Once this is complete, screw the cap on the bottle and sanitize your water in Normal or CrazyCap mode, depending on the water source.

Shipping, Returns & Warranty

If you haven’t received your order, please contact our support team via email at  hello@thecrazycap.com,or call our toll free number at  833-642-7659, and our team will be sure to assist you in a timely manner.

Lifetime warranty summary: The CrazyCap warrants the included product and the accessories against the defects in materials and workmanship for 10 years from the date of original purchase. The CrazyCap does not warrant against normal wear and tear, nor damage caused by accident or abuse. The CrazyCap requires you to return your product before a warranty replacement is issued, but may waive this requirement.

CrazyCap’s battery will last approximately 7 days on a single charge with normal use. Using the CrazyCap more often will reduce the battery life.

You can file a warranty claim by following the link below:


The life of the CrazyCap UV light is 10 years, or 500,000 treatments. The user cannot replace the light themselves.

The Other Stuff

Yes, CrazyCap fits the 17oz CrazyCap bottle and is also compatible with other 17oz bottle brands.

However, CrazyCap is only compatible with the CrazyCap 25oz bottle.

Try changing the gasket, aka the “O” ring, and this should resolve the issue. If you are still experiencing an issue, please reach out to our support team.

Please use the link below to register your product:


The serial number is located on the black portion of the CrazyCap.

No, we do not recommend keeping the CrazyCap or bottle in the refrigerator.

Our bottles are double-wall, vacuum insulated, stainless steel bottles. It will keep your water cold for 24 hrs and hot for 12 hrs. 

If the bottle is filled with room temperature water and placed in the fridge, it will have no impact on the water temperature. The double-wall vacuum insulation in the bottle will not allow cold air to cool the water.

A product review can be posted using the link below:


Please scroll down and you will see the section that says, "Write a review about this product.” 

Once your review is submitted, please send us a screenshot of the review with your first name, last name and shipping address, and we will process your reward immediately.

We offer 12oz, 17oz, and 25oz bottles.

The twin/dual pack comes with 2 chargers; one for each unit.

Yes. LYT by CrazyCap comes in a reusable plastic bottle version. Please refer to the link below for more info: 


Yes, we carry the carabiner clips that fit the 25 oz bottles.

You can claim your reward by following the link below.


Yes, we do have a special discount for First Responders and Teachers. Please follow the link below to learn more:


See the link https://youtu.be/Ef9hQIxwgsQ

CrazyCap purifies 50 to 60 litres of water on one charge.