The main downside is you have to rinse it, and it comes with a brush to clean which I sometimes use. However I haven’t ever actually noticed it getting dirty. I drink water / tea flavored with stevia so it might not be as clean if you drink something else.
The main downside is you have to rinse it, and it comes with a brush to clean which I sometimes use. However I haven’t ever actually noticed it getting dirty. I drink water / tea flavored with stevia so it might not be as clean if you drink something else.