For optimum performance, it's essential to prep your water filter before diving in for that refreshing sip, and remember to change your water filter cartridge after processing around 40 gallons (151 liters) or roughly once every two months for the average family hustle and bustle. To do this, immerse the water filter cartridge in cold water for a good few seconds. While it's happily submerged, give it a gentle shake to ensure that any pesky air bubbles are effectively removed. Once you’re satisfied, discard the water you used. Next, place the water filter cartridge snugly in the reservoir opening, pressing it down firmly to ensure it’s seated completely in position. If you find it’s not sitting just right, a little rotation should help. Now, fill the reservoir with cold tap water and let nature take its course as the water filters through. Be aware that the first two fillings may contain some filter media sediment, but don’t worry, that’s totally normal and just a part of the process—make sure to discard that water. After a couple of rounds, refill the reservoir once again, and voilà! Your system is primed and ready to use, making hydration a breeze. And just a side note on size — it measures 11.61 inches in length, 2.56 inches in width, and 11.02 inches in height, with a lightweight presence of 2.39 pounds to boot. Cheers to cleaner water!