MSR AutoFlow Gravity Water Filter for Camping and Backpacking, 2-Liter Price: $105.95 (as of 01/28/2022 06:21 PST- Details)

No pumping: uses the power of gravity to filter 175 liters per minute, offering you the efficiency to Multi-Task at camp
Rolls tight: durable film reservoir and closure system reduce bulk for discreet packing