It does what!?
Pump filters are on the way out! Why pack that heavy 3 liters of water in your hydration pack when your hiking along a stream or river? Just carry this kit (for less weight leave the clean bag at basecamp while out exploring) and fill up when you're thirsty and drink. (You'll need to buy a bite valve though).
Then when relaxing at basecamp just wait 2 mins have 2 liters of water. Leave time for the more important things when you're in the backcountry with your partner ;).