This is quite a nice gadget for tracking how much water we drink in a day. With every bottle, twist the lid and the counter will increase by one dot. This gives an indication how much is drunk. There are a total of four dots. That would amount to 2.4 litres.
Apparently it is supposed to work automatically! Not sure how.
About 15 USD for this, I think I will pass. Easier to use Actifit as my counter if I need to.
Drink water!