All plastics in the Sport Berkey® filter bottle are food grade, Bisphenol A (BPA) free.

- The bottle is made of low density polyethylene

- The cap is made of high density polyethylene

- The straw is made of polypropylene.

Your Berkey® Sport Bottle Filter has a 50-year shelf life! When not in use for an extended period of time, remove the filter and fill the unit with bleach at a rate of one-quarter teaspoon per 2 liters of water, or a 50/50 mixture of 3% hydrogen peroxide. Rinse. Allow the parts to dry completely with the cap removed. Reassemble the assembly and store if possible in an airtight bag. Do not allow the filter to freeze, do not place it in the microwave, and do not run hot water through it.

To refresh the water in your bottle, you may want to put your Sport Berkey® filtering bottle in the freezer for about 20 minutes. ABSOLUTELY NOT!!!

We formally advise you against letting the filtration elements freeze. We also advise against storing the elements (even unused ones) in very cold climates. Indeed, very cold or frozen water may expand inside the filter and consequently increase the size of the pores, which would make the filtration inoperative. Whether the elements are unused or used and completely dried, a small amount of moisture may still remain inside the filter, especially in predominantly humid climates. This moisture could expand inside the element and render it unusable.

This recommendation applies to ALL of our Berkey® filter elements. Freezing your element and rendering it unusable will void your warranty coverage.

In certain situations, your Sport Berkey® filter bottle can be subjected to high temperatures. This is the case, for example, if it is left in the trunk of your car in the sun...

You should therefore remember that your filtering bottle should not be subjected to temperatures above 46°.

Yes, it is possible to put your Sport Berkey® water bottle in the refrigerator, but under no circumstances should you let it freeze. The expansion of the water in the filter could enlarge the pores and compromise its integrity, rendering it inoperable and voiding the warranty.

It is not recommended to let your filters freeze. Similarly, it is not recommended to store the elements (even unused ones) in very cold climates. Indeed, the residual water contained inside the element will expand and consequently increase the size of the pores and eventually destroy the element. Whether your filters are unused or even used and completely dry, a small amount of moisture may remain inside, especially in predominantly humid climates. This moisture could expand inside the filter and render it unusable. Please note that this recommendation applies to ALL Berkey® items, including the Berkey® Sport Bottle. Freezing your item and rendering it unusable will also void your warranty coverage.

It all depends on the technique used. CO2 or magnetic softeners, for example, produce water that is normally drinkable (to be confirmed by the manufacturer) and is not a problem with Berkey® systems.

But the most commonly used softeners work with ion exchangers that convert calcium and magnesium, which are responsible for the accumulation of limescale, into sodium. Using these softeners produces soft but salty water...

Black Berkey® water filters are designed to remove a very large number of pollutants as specified in test results from an independent laboratory. However, they do not remove the mineral salts initially present in the water and preserve them for the benefit of our body. The salts used to soften the water in your softener, and present in large quantities, will not be filtered by the Black Berkey® filtration element and will end up in your drinking water. Unlike natural mineral salts, they are highly concentrated and should not be consumed.

Therefore, we do not recommend that you use water softened by a water softener to supply your Berkey® purifier.
Note: Some systems are equipped with a bypass to remove water from the system before it goes through the softener. In this case, this water can be used without any problem with the Berkey® water purification systems.