Brita 23.7 Ounce hard sided water bottle reduces the taste and odor of chlorine and makes tap water taste great anywhere. The filter inside this BPA free bottle filters as you drink, so you can always have great tasting water without the waste and high cost of bottled water. One water filter can replace up to 300 standard 16.9 Ounce water bottles, keep you hydrated, save you money, and reduce plastic waste. The durable hard-sided plastic, built-in carrying loop and Easy-sip spout make this water bottle effortless to take on the go, whether going to a sporting event, a day trip, or to the office. Just fill the plastic water bottle, screw on the cap, flip open the straw and Hydrate with cleaner water for pennies per gallon. For optimum performance, filter should be replaced every 40 gallons or very two months, whichever comes first. Use Brita for better tap water, a better world, and better value.