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CrazyCap vs LARQ (2021): Which Self-Cleaning Water Bottle Is Better?

While reusable bottles can replace thousands of plastic ones, there is a bit of a downside. For most models, the dark environs can turn stagnant water into a breeding ground for bacteria and molds. This is especially true if you, like many, forget to clean your bottles regularly.

It’s this problem that the CrazyCap and LARQ water bottles try to address. Using UV light technology to kill viruses, these regular-looking drinkware become portable purifying devices. A quick look at their specs, however, reveals fairly similar product features. So which one should you get? Read our comparison below to find out.

CrazyCap vs LARQ Water Bottle Comparison Chart

ModelCrazyCap 2 LARQ Bottle PureVis
 CrazyCap 2.0 UV Water Purifier & Self Cleaning Stainless Steel Insulated Water Bottle - Turns Any...LARQ Bottle PureVis - Self-Cleaning and Insulated Stainless Steel Water Bottle with Award-winning...
PriceCheck PriceCheck Price
Cleaning TechnologyUV lightUV light
Minimum Cleaning Cycle1 minute1 minute
MaterialStainless steelStainless steel
Capacity12 oz, 17 oz, 25 oz17 oz, 24 oz, 25 oz, 32 oz
Double Wall Vacuum InsulationYesYes (for Bottle PureVis lineup only)
Battery Life7 days10 to 12 days (adventure mode), up to 28 days (standard mode)
Warranty10 years12 months


CrazyCap and LARQ both use UVC LED technology on their bottles’ caps to purify water.

CrazyCap vs LARQ Technology Comparison
On the left, the technology behind CrazyCap’s UVC-light cap; on the right, a closer look at LARQ’s smart lids.

The idea of a self-cleaning bottle sounds futuristic, but its application is quite simple. CrazyCap and LARQ’s drinkware looks like your typical insulated water bottles. Instead of a regular lid, however, these bottles’ caps have built-in UV lights. In both cases, UVC is the specific type of light used and applied through CrazyCap and LARQ’s patented LED technology. UVC, after all, is the most effective for disinfecting.

Apart from bacteria, UVC as a germicidal is effective at destroying or deactivating molds, fungus, and even viruses. The LED technology also ensures no mercury is used in any of these portable water purifiers. It does away with filters, too, making CrazyCap and LARQ bottles convenient to have around.

Cleaning cycles offered by these bottles vary as well. On CrazyCap and LARQ, the standard cleaning mode purifies water in just one minute. This is recommended for daily use. If you’re not sure about your water source’s quality, however, there’s also a special mode on these bottles. CrazyCap aptly calls it Crazy Mode, which is a 2-minute cleaning cycle, while LARQ markets theirs as Adventure Mode, a stronger 3-minute treatment.


CrazyCap and LARQ bottles are BPA-free and crafted from durable stainless steel.

CrazyCap vs LARQ Design Comparison
Both brands are available in a range of colors and patterns, along with some limited-edition options.

When it comes to design, CrazyCap and LARQ are quite conventional. It’s easy to mistake them for regular but sleek-looking reusable bottles. LARQ shares that their products are crafted from 18/8 stainless steel, while CrazyCap uses 304 stainless steel. These materials are highly durable and corrosion-resistant.

Now, CrazyCap bottles are double-wall vacuum insulated. It’s a design feature that keeps your drinks hot or warm for hours. CrazyCap bottles also come with an IPX7 waterproof rating and are available in 12-oz, 17-oz, and 25-oz variants.

With LARQ’s catalog, however, there are some nuances. The company has two lines of self-purifying water bottles β€” the LARQ Bottle PureVis and the LARQ Bottle Movement PureVis. The former features double-wall vacuum insulation and are available in 17-oz and 25-oz variants. It also uses LARQ’s two-tone proprietary powder coating.

Meanwhile, the Bottle Movement PureVis range uses single-wall construction. While it’s not insulating, it does make for a more lightweight bottle and translates to a larger-capacity drinkware. The Bottle Movement PureVis is available in 24 oz. and 32 oz. models. They also feature a protective silicone sleeve, ideal for the wear and tear of outdoor adventures or trips to the gym.


Although comparable in terms of insulation, LARQ’s bottles have a slight edge over the CrazyCap when it comes to antimicrobial efficacy.

CrazyCap vs LARQ Performance Review
CrazyCap and LARQ bottles are designed for the elements.

So how well do these portable purifiers work, especially against common causes of illnesses like E. coli and Salmonella? CrazyCap shares that in a normal, one-minute clean cycle, its bottles have a kill rate of 99.91% against E. coli bacteria. In Crazy Mode, however, the 2-minute cycle achieves a kill rate of 99.99%. Against Salmonella, CrazyCap has a 97.8% kill rate in 1-minute cycles and 99.9% in 2-minute cycles.

LARQ’s bottles, on the other hand, can kill 99.9775% of E. coli during a 1-minute treatment and 99.9999% during a 3-minute cycle (Adventure Mode). Tests also show the LARQ bottles yield a kill rate of 98.1976% for a 1-minute cycle and 99.9999% at 3-minutes against Salmonella. Based on these numbers, LARQ has the edge over CrazyCap when it comes to antimicrobial efficacy.

In terms of insulation, however, CrazyCap bottles and LARQ’s Bottle PureVis are comparable. Both products are designed to keep hot beverages up to 12 hours and cold drinks up to 24 hours.

Battery Life and Accessories

LARQ bottles have a better battery life, while CrazyCap offers more accessories.

CrazyCap vs LARQ Charging
On the right, CrazyCap’s portless charging; on the left, LARQ’s USB charging.

Both CrazyCap and LARQ use lithium polymer batteries, similar to what you find on your phones. CrazCap shares that their bottles can go for 7 days on a single charge. It lasts even longer if you’re primarily using the normal cleaning mode. In contrast, LARQ claims their bottles can last for up to 28 days in normal mode when fully charged. If you opt for the Adventure Mode, battery life decreases but to a still impressive 10 to 12 days.

A key difference between the two, however, is their charging style. CrazyCap doesn’t have any charging ports. Instead, you simply place the accompanying charger on top of the cap. This ensures its lithium-ion batteries never come into contact with water. LARQ, on the other hand, has a more traditional approach, using a micro-USB port on the side of the cap for charging.

As with other reusable water bottles, there are accessories available for these high-tech bottles. For instance, you can get LARQ’s Active Loop, which is a protective silicone cover for your bottle’s cap. It also comes with a detachable carabiner. There’s also a limited-edition sleeve, too, with an easy-carry strap for LARQ bottles. Made from neoprene, the material snugly fits medium-sized bottles.

CrazyCap accessories, on the other hand, include handles, carabiner clips, and a soft silicone boot for your bottle’s base. Users can also get their hands on replacement chargers. The best part about CrazyCap, however, is that they also sell the cleaning cap on its own. This means you can just purchase the cap and add it to compatible cola-style bottles.


Get the CrazyCap bottle if you’re on a budget. If you’re willing to invest in this kind of technology, however, go for LARQ’s Bottle PureVis.

Self-purifying bottles solve one of the main concerns about reusable drinkware β€” water quality. As such, expect these products to become a staple not just among outdoor enthusiasts but for most people, too. If you want to try out the technology first, then the CrazyCap is a solid choice. The brand’s UVC LED tech is reliable and offers impressive kill rate percentages. Plus, they come in a variety of designs and accessories without breaking the bank.

LARQ water bottles, however, are a better option if you want to invest in self-cleaning bottles. While a bit more expensive than CrazyCap, LARQ bottles offer a longer battery life and slightly better antimicrobial efficacy. You also get to choose from two models. LARQ’s Bottle PureVis is ideal for those who want to insulate their drinks. Meanwhile, the LARQ Bottle Movement PureVis is great for those who want an ultra-lightweight and large-capacity bottle without insulation.


πŸ“Œ What’s the difference between CrazyCap and LARQ water bottles?

CrazyCap self-purifying bottles use portless charging, unlike LARQ, which relies on a micro-USB port. LARQ, however, has a longer battery life and better bacteria kill rate than CrazyCap.

πŸ“Œ Can I purchase the LARQ cap on its own?

No, LARQ does not sell its bottle caps separately. If you want the UVC LED tech for purifying your water, you will need to purchase a bottle.

πŸ“Œ Can I use the LARQ Bottle PureVis for tea or coffee?

While the LARQ Bottle PureVis is double-wall insulated to keep beverages like tea or coffee or warm, LARQ recommends using the bottle primarily for water. If you do use the Bottle PureVis for tea or coffee, make sure to wash the bottle with warm, soapy water after use.

πŸ“Œ Is CrazyCap a good brand of self-cleaning water bottles?

CrazyCap is a solid brand if you’re looking for self-cleaning drinkware. The bottles are NSF/ANSI certified. They’re also listed as one of TIME’s Best Inventions of 2020.

Last update on 2021-07-19 / Affiliate links / Images from Amazon Product Advertising API

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Mari Bassig

Senior Editor, writer and researcher passionate about gadgets, social media, and music.