To refresh the water in your Sport Berkey® Filter Bottle, you might think of placing it in the freezer for about twenty minutes. DON'T DO IT!!!

We strongly advise against letting the filtration elements freeze. We also advise against storing the elements (even unused ones) in very cold climates. Very cold or frozen water can expand inside the filter and consequently enlarge the pores, rendering the filtration ineffective. Whether the elements are unused or used and completely dried, a small amount of moisture could 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 our Berkey® filtration elements. Freezing your element and making it unusable will void your warranty coverage.