The 321 filter replacement pack contains 3 filter tablets for 321 Water filter bottle. The filter tablets significantly reduces chlorine and removes unpleasant tastes and odours with one easy plunge.
How often should I change my filter?
One tablet lasts 125 refills please change your filter:
Monthly – if you drink 2 litres / 68 ounces a day
Bi-Monthly – if you drink 1 litre / 34 ounces a day