HalfFull is a macOS menu bar application that reminds you to drink water throughout the day.
The glass icon in the menu bar will slowly deplete over time, and after about an hour, the glass will appear empty. Upon marking a glass as "finished" the icon will replenish to full and begin slowly depleting again.
If you accidentally marked a glass as finished, you can easily undo that action as well.
If you're a hotkey aficionado, you can use hotkeys!
option + shift + d= marks glass as finished
option + shift + z= removed the most recent finished glass
option + shift + c= clears today's water glasses