Thirst

Thirst is one of the major components of Tough As Nails. It's similar to Hunger and will be drained by the same actions, but will drop at a slower rate. Also similarly to Hunger, it will prevent you from sprinting and regenerating health if it's too low, and you will die of dehydration on Hard difficulty. There are a variety of ways to quench your thirst, from canteens to juices.

The Canteen is a basic item for restoring thirst. It can be crafted with a variety of materials, with higher tiers providing more uses. Glass bottles can also be used to collect water, however, water collected with the canteen/glass bottles will be impure, and will have a chance of giving the Thirst status effect.

The Thirst status effect will make your thirst drop at a faster rate, similar to the Hunger effect that can occur from eating uncooked foods and other items. To prevent this, you must purify water bottles/canteens with a Water Purifier.

Another way to get purified water is with a Rain Collector. They will fill up gradually when it rains, and any water collected from them will be purified.

You can also make various Juices with purified water, sugar, and various fruits. They restore more thirst than purified water, and can be stacked up to 16 bottles, so it's a great option if you plan on travelling or won't be near water for a while.

In addition, potions and buckets of milk also restore thirst. To see the amount of thirst that a drink restores, hover over it in your inventory and check the info in the tooltip.

(NOTE: You can change whether Thirst will prevent you from sprinting and/or regenerating health in the configuration settings!)

(NOTE: You can also completely disable the Thirst feature in the configuration settings!)