Make sure you're drinking clean water by using the Philips GoZero Active Water Bottle. The bottle is made of food-grade plastic and accepts 2 interchangeable filters to make sure impurities stay out of your water. Holds up to 20 oz of water. BPA-free food-grade plastic construction to last for years. Able to work with 2 interchangeable filters to help transfer tap or natural water into clean drinking water. Activated carbon fiber filter absorbs impurities in water quickly. Filters up to 52 gallons per filter. Filters last nearly 4 weeks and have built-in indicators to tell you when they need to be changed out. Reusable & avoids disposables - designed to be used repeatedly, helping you avoid single-use disposables and potentially save money.