improving the drinks monitoring

On the fluids there is obviously the option to put in the drink and then slide up what the drank. There are 2 features that would make that better; a "did not drink" button so it is clear that it hasn't been slid up because it wasn't drank rather than forgotten AND a completed button for when the drink has been slid up and then taken away (if they only drink 70ml of 150ml for example). PLEASE DO THESE- IT WOULD BE SO HELPFUL.