Great little invention!
I drink so much more water because of this, and it has changed my poor water habits for the better!! On days that I have this on my thermos, I actually have to refill my 32oz thermos twice throughout the day, and on days I don’t use it, I barely finish 1/2 of one 32oz thermos.  It’s helped me reduce headaches due to dehydration and just a great little invention! Just don’t sleep with it facing you on your nightstand, that little light is quite bright.
Rating: 5 stars