I have considered five important criteria when using each reusable water bottle: filtering and filter capabilities, materials, taste, ease of use and cleanup. These are the causes of you when looking for a bottle of water in a bottle of water. You would like to buy one that is appropriate for the activities you are planning to use for. For example, if I was looking for a filtered bottle to take backpacking, I would not choose Brya. If I only need a bottle for tap water, I will not invest in the grail geopress.
Filtering
Look for a filtering process that filters out the harmful contaminants, bacteria and viruses and other unpleasantness probably out of potential non-polluted water. Does the filter leave any particles in the water after filtering? Also, consider how much it costs to replace filters and how easy it is to replace them.
Material
Most filtered water bottles are made of plastic or stainless steel. If the bottle you consider is made of plastic, make sure it is BPA-free. Also, make sure it is sustainable. Will a few drops of water bottle dent? If you are a hiker and a light weight bottle is needed, is the material too heavy?
Taste
This is pretty obvious, but you want a filtered water bottle that leaves you with freshly-tasteful water. You do not want any residue like mineral odor or chemical taste such as chlorine taste.
Ease of use
The bottle should be easy to keep together. The filter should be easy to insert and replace. Also, consider how water flows from the straw to your face. Do you have to tackle it in a certain way to get water out?
Cleanup
You want a filtered water bottle that is easy to clean. Check if the bottle is washed washer. After use, what do you have to do with the bottle? Can you easily store it?
NSF/ANSI Certificate
To ensure security, reliability and quality, the National Science Foundation and the products tested by the American National Standard Institute.