Sawyer Products Dual Threaded MINI Water Filtration System Price: $24.81$34.99 (as of 11/26/2020 17:11 PST- Details)

High-performance filter fits in the palm of your hand; 0.1 micron filter removes 99.99999% of all bacteria and 99.9999% of all protozoa and cysts
Dual-threaded MINI allows you to screw the push/pull cap onto the filter for easy on/off functionality and water flow control