Keep your bottle for years! Just replace the filter element.
The Sport Berkey Water Bottle with Filter has a shelf life of 50 years. When the filter system will not be used for an extended period, flush the unit with a chlorinated solution of 1/4 tsp. per two liters of water. Allow to dry thoroughly with cap removed. Reassemble and stow. DO NOT allow filter to freeze, do not place in microwave oven and do not run hot water through the filter.