Our Carbon Filter Water Bottle holds over 18 fluid ounces (550ML) and is BPA-Free. Transparent plastic is 8.7 inches x 2.8 inches x 3.2 inches in size and is drop-resistant. Carbon-based filter reduces chlorine and organic contaminants from regular municipal tap water. Replace filter every 40 gallons or two months. Hand wash bottle and filter. Dry filter well.