The 20 -ounce filter fresh personal water bottle with an on board filtration system gives you the taste of bottled water for half the price and a lot less waste. The filter fresh bottle"s on board filter, filters the chlorine out of tap water on the way out of the bottle as you drink, so the water is always fresh and tastes great. The bottle features graduation lines for tracking consumption, a soft silicone neck band that enhances grip, a finger loop for easy carrying, and a protective cap to keep the spout clean. The included filter can be used up to 100 times before it needs to be replaced. The filter is ready to go out of the box and drops easily into place. The on board dial on the filter helps you keep track of the amount of uses so you know when it is time to replace it. The bottle is bpa free and is great for the environment because it eliminates the wastes of disposable plastic bottles.