1. Find a drink, while thirsty.
2. Pick up the Drink
3. Drink the Drink.
4. Open inventory
5. Right click drink
6. Press use / drink
7. Animation ensues
8. Thirst does not replenish.
I'm not sure if this isn't enough information, but this is all I know about how to bug report so sorry if this is insufficient information.
EDIT: Image linked with post, which shows an image, with notifications that I have taken swigs from canteen, where as all of those swigs, the water-bottle being consumed, and the screenshot all have been taken within a Minute)