FAQ Topics

Care & Usage

How do I clean my KOR vessels? Can they go in the dishwasher?

Yes, you can wash your vessel in the dishwasher, but in the top rack only as the heating elements used to heat the water and air dry the dishes are usually located beneath the bottom rack, which may cause nearby plastics to melt. Because of the unique shape of KOR products, we highly recommend hand washing with hot water, a small drop of dish soap and a bottle brush. Tritan (the transparent plastic that the vessel body is made of on all bottles styles except Vida) has been shown in tests to withstand 500 washings with no visible degradation. That means if you wash your vessel once a week, it should last 10 years or more (compare that to polycarbonate, the most common type of clear hard plastic used in water bottles, which started to degrade after only 30 washings in our tests). Allowing your vessel to air dry completely with the cap open will help to avoid unwanted moisture build up in your KOR and around the seals.

Keeping your vessel clean is important, especially if you are using it for any other liquid besides plain water. Daily washing of your bottle is necessary when you are using additive powders, liquids, vitamins, and non-water liquids, as these types of contents can smell or cause mold if residue is left in your vessel. Since our mouths naturally harbor bacteria, it is highly recommended that you do wash your vessel daily even when carrying just water.


Is it safe to put my KOR vessels in the microwave?

No. KOR products feature stainless steel components in the hinge and within the cap assembly and therefore should never be placed within a microwave.

My KOR vessel appears to be leaking. What should I do?

KOR vessels feature an innovative cap and seal that is completely leak-proof when fully closed. If you think your vessel might be leaking, please first check these potential causes to address the issue:

Make sure the water leak is not coming from residual water that is trapped outside the spout and within the cap before closing (note: when filling your KOR, make sure you do not accidentally fill the cap with water as this water will spill when the cap is flipped close to seal the bottle).

It is possible residual water has been trapped within the side trims of the KOR bottle when washing or refilling. Simply wipe the bottle surface with a dry towel or allow to fully air dry after cleaning.

Be sure not to pull too aggressively on the handle as this can temporarily create a minor gap between the seal and spout, particularly if positioned upside-down. This could result in a momentary leak. Examine your round interior seal and make sure it is seated properly with no twists or gaps. If it is not on securely, the vessel most likely will leak. 

How do I know if my KOR vessel is completely closed?

KOR ONE, Delta, Nava, Sport: These styles feature an innovative hinged cap and threadless spout. The cap, hinge and seal have been designed to be completely leak-proof when closed. To close, be sure to firmly push down on the cap and ensure the latch closure has fully engaged. You should hear a "snap" sound when the cap is securely closed.

Aura, Vida: Simply turn the cap clockwise until it is tight, which puts enough pressure between the cap and the spout to seal it closed.


My seal came off during washing. What should I do?

Aura, Delta, Vida and ONE : The seals are permanently fixed to the cap, so they should not come off while washing.

Are the Stone caps replaceable?

The Stone cap is fully replaceable. Send support@korwater.in an email and we will assist you in receiving a replacement.

Can I put hot liquids in my KOR vessel?

We don't recommend it because the sides of the vessel may get very hot to the touch. Please do not submerge your KOR in boiling pots or witch cauldrons to zap away germs — refer to our safe cleaning instructions.

Can I put alcoholic beverages in my KOR vessel?

We don't recommend it since the KOR vessels weren't designed to hold alcoholic beverages and have not been tested for use with them (we can't be responsible if you do try it, but we won't tell either).

Can I put carbonated or sparkling liquids in my KOR vessel?

We don't recommend it because the pressure from the carbonation in soda pop, beer, sparkling water, etc. can build up inside the vessel and can compromise the seal, causing the vessel to leak or in some cases, break the cap.

Will ice cubes fit in my KOR vessel?

Yes. The mouth of the KOR vessels is large enough to handle most ice cubes.

Do I need to wash my KOR vessel before using it for the first time?

Yes. Before use, you should either thoroughly rinse your vessel with soap and warm water or run it through the dishwasher in the top rack.es the KOR vessel keep water cold?

Will the KOR vessel make my water smell or taste like plastic?

No. We sometimes hear this complaint about polycarbonate, steel, aluminum and HDPE bottles. KOR vessels are made from Eastman Tritan™ — or in the case of Vida, food-grade stainless steel — which has no odor and imparts no taste.

Does the KOR vessel keep water cold?

KOR vessels weren't designed to keep beverages cold, but its wide mouth is great for dropping in a few ice cubes.

Are KOR Hydration Vessels unbreakable?

No. While made with durable materials and high quality manufacturing techniques, KOR Hydration Vessels are sophisticated pieces of engineering and are not intended for extreme physical conditions such as hiking or camping. The KOR ONE in particular must be treated like glass due to its tapered design and heavy weight. When cared for properly, any KOR vessel will provide years of pleasurable and practical use.

Will my KOR vessel leak if I leave it in my bag or I lay it on my car seat?

KOR vessels are designed to be completely leak-proof under normal conditions and with proper use. As long as the vessel has been properly closed, it should not leak in your bag. In the Delta and KOR ONE, listen for the “click” and you will know it is shut tight.

The Stones™ thing sounds cool, but what are they?

KOR Stones™ are disc-shaped inserts that fit inside the cap of the KOR ONE and Delta vessels. They're a way to personalize your vessel and a reminder of what's important to you. You can put anything you like on a Stone — a phrase that inspires you, the name of a loved one, your company's logo, even a picture. Once a Stone is inserted, it becomes visible inside the cap so every time you take a drink, you'll have a private, inspiring moment with your Stone.

Our Stones are printed on treeless waterproof paper by Fiberstone®, just in case you get any moisture in the Stone area while washing the vessels. When using your own paper or photo, it is advisable to remove it while washing the vessel.

Each KOR ONE and Delta vessel come with two Stones of pre-printed messages that inspire us (and hopefully you!).

Can I create my own KOR Stones™?

In the near future, we'll be offering some online tools that will make creating Stones easy and fun. If you print your own Stones at home, we want to caution you that the chamber where the Stones are inserted isn't waterproof. Washing your vessel or filling it too vigorously could result in your Stones getting wet. This could cause the ink to run or the paper to curl. If you create your own Stones, please remember to remove them before washing your vessel and be careful not to splash too much water on the cap when filling it with water.

How do I change my KOR Stone™?

KOR Stones are located underneath the cap insert on top of your KOR ONE or Delta vessel. The cap insert is the piece of rubber that sits on top of your vessel, directly under the handle. Simply lift the rubber tab and the insert will pop off. Then, insert your KOR Stones in the hollow area underneath the insert. Remember to place the Stones face down with any words facing the front of the vessel. If you're having trouble removing a Stone, just tip the vessel over and give it a little shake. Your KOR Stones should drop right out.

What are KOR Stones™ made from?

KOR Stones are printed on a unique recyclable, biodegradable treeless waterproof paper called Fiberstone®. This special treeless paper is actually made up of non-toxic resins and ground up rock.

Can I use Nava when I go hiking and camping?

Nava's filter was designed for use with potable water only. Lakes, streams and other backcountry water sources may contain harmful micro-organisms such as Giardia. Nava's filter will not remove these.

Can I take my Nava to high altitudes, such as on an airplane or to the mountains? What happens if I leave my Nava in my car in warmer climates?

We encourage you to bring Nava wherever you go! Just note that altitude or heat can cause pressure to build up in Nava, which will cause water to spurt from the mouthpiece when the cap is opened. To prevent this, twist the lid open about a quarter turn to release the pressure. Then tighten the lid back on, sip and enjoy! (This reaction is quite common in closed containers such as lotion bottles, snack bags and other straw-based reusable water bottles).

Can I drink juice, Gatorade or other flavored beverages from the Nava?

If you want to drink flavored beverages, just remove the filter and the Nava will work fine. Otherwise, you might ruin the filter and/or cause your beverage to taste bad. For an even better filterless experience, just swap in one of our Nava Sport straws (coming soon). It will give you slightly better flow and sleeker appearance.

Will the Nava function without the filter in place?

Yes, it will work fine. However, due to the large volume of the empty filter chamber, it will take somewhat longer to get water into your mouth on the first sip. After that, the Nava's air-tight seal will keep the chamber filled and you won't notice anything unusual on subsequent sips (unless you open the bottle which breaks the seal). To eliminate this problem and to provide a sleeker look when going filterless, we have created a special accessory straw you can use in place of the Nava's original straw. This straw will soon be available to purchase as the Nava sports straw.

Can the activated carbon in the Nava filters themselves be replaced? Or would the Nava filters be considered disposable only?

The entire filter must be replaced when it has reached the end of its useful life. We have been very careful avoid excess material in the design of the filter. Apart from coconut carbon, the filter contains only two other ingredients: a small amount of polyethylene binder and a small silicon plug (about the size of your pinky fingernail).

If not replaced after 40 gallons, the filter will still be usable but will not be as effective. If you keep using it, eventually it will lose all ability to filter your water. We have not tested it beyond 40 gallons so we cannot tell you when this happen. However, there is no harm in going past the 40 gallon mark. The worst that will happen is your water will start to taste like what came from your tap.

What if I barely use the Nava filter? Do I still have to replace it after three months?

The filter does not lose effectiveness with time, only usage. For example, if you have only filtered 10 gallons in 6 months the filter will still have 30 gallons of life expectancy. We state three months as a guideline because most people aren't measuring their water intake by the gallon.

What happens if my filter freezes?

We don’t recommend freezing a moist filter because the water will expand when frozen, which may lead to breakage. Therefore you should inspect the filter. If it isn’t cracked or broken, it will still function.

My tap water has high concentration of iron. Will the Nava filter out the iron?

Unfortunately, Nava won't remove much iron from the water. Activated carbon is generally not very effective for that purpose.

What does the Nava filter remove from water?

Nava’s filter is primarily designed to make tap water taste and smell great. It does this by reducing the amount of chlorine in the water. It has been tested by an independent lab to meet or exceed the NSF Standard 42, Class II for chlorine removal. The activated carbon in Nava's filter also traps volatile organic compounds (VOCs) such as benzine, but the filter has not been tested or certified for this capability. It is also important to note that Nava is designed for use with potable water only. It does not remove Giardia or other harmful microbes.

How effective is the Nava at reducing the mineral content or improving the taste of hard water?

Nava's filter has been tested to reduce chlorine. While it has not been tested for the removal of minerals and other dissolved solids, activated carbon filters, such as the Nava's, are not very effective for such uses. Reverse osmosis filters and water softeners are your best bet for improving the taste of hard water.

How does the taste of Nava compare to bottled water?

In our tests, subjects gave high ratings to Nava's taste and consistently preferred it to tap water. But taste is also highly subjective, so we can't guarantee everyone will agree. It's also worth mentioning that many leading bottled water brands are simply filtered tap water.

What makes Nava different from other filtered bottles?

Here are some of what differentiates Nava from any other filtered bottle we know of:

•Stunning looks: Nava was designed to compete head-on with the sex appeal of bottled water. Our goal was to design an object so striking that people would want to take everywhere.

•The ultimate in drinking comfort: Nava's ergonomic mouthpiece is the result of over a dozen prototypes. It feels great on your lips and makes using Nava a joy.

•Optimized water flow: Nava's filter and filter housing were carefully designed make drinking feel natural. Unlike other bottles, drinking from Nava doesn't require squeezing, biting or excessive sucking. You sip naturally as you would from a straw.

•Hands-free and splash proof: Nava features a flip top push-button cap that opens with a click. Perfect for driving, working out or other situations where your hands are tied up and you want quick, splash-free hydration.

•Protection from germs and dirt: Unlike most bottles, which force you to put your lips on an exposed surface, Nava's cap completely protects the mouthpiece when not in use.

•Foolproof filter replacement: Nava is the first bottle with its own filter subscription service. Sign up online and receive filters to your door when you need them.

•Health safe and sustainable filtration: Nava's activated carbon filter is made from coconut shells, which are widely recognized as the most effective material for carbon filtration. After harvesting, the shells are converted to activated carbon using a proprietary process that minimizes greenhouse gas emissions. Unlike coal, which takes millions of years to form and may contain heavy metals, coconut is a renewable and health-safe resource."

Health & Safety

I have been hearing a lot about BPA. What is it?

What is the Nava filter made from?

What is activated carbon?

Is the Nava's filter compostable/biodegradable?

What do you mean about your filter being "sustainably manufactured"?

Does the Nava filter contain any ingredients that prevent bacterial growth?

Is my KOR vessel made from recycled materials?

You say that KOR vessels are recyclable. So why isn't there a recycling symbol or code on it?


How do I place an order?

How do I set up a KOR online account?

Can I change or cancel an order once I've placed it?

What happens if an item is backordered?

I live outside the U.S. How can I purchase KOR products?

Why was my card declined?

How do I use a voucher and/or coupon code?


Which payment methods do you accept?

Is my transaction secure?

When will I be charged?

How do I know you've received my order?

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