FitsAll Filter. Its unique design offers flexibility to filter water into bottles with a wide range of mouth sizes. Water can be poured through the FitsAll Filter or you can submerge the combined FitsAll Filter and bottle of choice. The SteriPEN FitsAll Filter cup and funnel fit into narrow-mouth bottles such as commercial water bottles, soft-drink bottles, canteens and SIGG™ bottles. On wider-mouth bottles, such as Klean Kanteen®, Gatorade® and Nalgene® bottles, only the cup is necessary.
The FitsAll Filter cup also serves as an adapter that allows the SteriPEN Classic or Journey LCD Water Purifiers to be used with these wide-mouth water bottles in the inverted position. The FitsAll Filter is made with rugged, flexible materials that allow the filter to be squeezed during storage and return to shape when unpacked.

Water Bottle Pre-Filter. Before blasting the UV, do a little pre-screen with SteriPEN's SteriPEN Pre-Filter. This 40 micron durable nylon screen is great for removing particulates from water that is bound for your bottle.

Replacement Filter Cartridge. Designed for the SteriPEN Pre-Filter and SteriPEN FitsAll Filter. Removes debris and particulates using a 40 x 40 micron size nylon mesh filter. SteriPEN Filter Cartridges are made to last. Durable and reusable. Just rinse between uses.