Not worth the price
I like the idea of the reminder for my Mom with dementia who needs to drink more water.  It does help her remember to drink when the light flashes.  I gave it a 3 stars cause I don’t think it’s worth $25.  It’s more like a $10 or $15 dollar value.  For the average person if you carry your water bottle with you, you are going to drink water and don’t need the reminder.
Rating: 3 stars