Grayl ultralight Compact water filtration
How much water does it purify
How much foe replacement filters
Thanks for reaching out!
The Grayl Ultralight Compact Water Purifier bottle cartridge is rated for 300 uses, or ~40 gallons/150 liters of water. You can find the link for the Grayl Ultralight Compact Water Purifier Cartridge here.
Hopefully this helps, thanks!