Bests & Worsts Reviews from Amazon

I noticed mixed reviews about how easy it is to suck the water up the straw. Some users say it's not so bad, others say it is very difficult. When I received my bottle, I fell into the latter category. My face hurt after a few sips. If you remove the carbon filter at the top altogether, the straw is very easy to draw water through. If you have a straw that is difficult to draw through, you can try the following small rework to see if it helps you. For me, it made it bearable to use the straw with carbon filter installed, after this small adjustment. Instruction: 1. Remove the carbon filter from the top of the straw 2. Pry open the plastic casing with finger nail 3. If you can see the seam on the top of the plastic casing (this reduces the surface area for water to pass through), gentle remove the carbon bag 4. Re-position the bag with seams along the cylindrical wall of the plastic casing 5. Gently push and wiggle the bag back into the casing, and replace the cap 6. Put the carbon filter back into the straw and check to see if easier to draw water through the straw