The 16.9 fl oz UltraPress® Ti Purifier Covert Edition is a titanium water filter bottle designed for strength and durability. It removes waterborne pathogens, including viruses, bacteria, and protozoa, and filters particulates, chemicals, pesticides, herbicides, and heavy metals. The outer titanium cup can be used to heat water and cook food near a fire or on a camp stove. The bottle is compact and easy to use, making it suitable for outdoor activities.