The Steripen Fitsall Filter is the perfect companion for your Steripen water purifier, providing an extra layer of filtration to ensure clean and safe drinking water wherever you go. This versatile filter is compatible with any wide-mouth water bottle, allowing you to easily purify water on the go without the need for additional tools or equipment.The Fitsall Filter features a 4-stage filtration process that removes bacteria, parasites, sediment, and other contaminants from water sources, giving you peace of mind knowing that your water is safe to drink. The filter is also reusable and long-lasting, providing up to 6 months of use before needing to be replaced.Compact and lightweight, the Steripen Fitsall Filter is the ideal choice for hikers, campers, travelers, and emergency preparedness kits. Stay hydrated and healthy with the Steripen Fitsall Filter, your reliable source of clean water on any adventure.