Ozmo's $60/£45/AU$80 Active Smart Cup wants to help you stay on track in terms of hydration.
Thanks to built-in sensors, this hefty coffee-tumbler-style cup is supposed to be able to tell the difference between water and coffee.
Then it automatically logs how much water/coffee you're drinking daily on Ozmo's related Android/iPhone app.
The lid must be on tight for it to log correctly.
Ozmo will also give you LED- and vibration-based alerts throughout the day to remind you to drink or let you know that the lid isn't secured properly.