Working perfectly to remind my child to drink her fluids!
I know the description says "not for children" but I purchased it for my 9 year old who is chronically dehydrated.  She gets sidetracked at school and just forgets to drink water all day.  She would come home with a completely full water bottle.  This little cutie (I purchased in pink and it looks like a little heart when attached to her water bottle).  It lights up with a small white light at the top about every 30 minutes.  She puts it at her work station in the morning and if she isn't there when the light goes off, a classmate will alert her.  She's starting to develop the habit of keeping her water bottle with her all the time (at home too).  I have a second one for my teenager now.
Rating: 5 stars