Extra water rations. Greatly reduces the difficulty of travelling through desert. 
| Water | 
 | 
| Effect | 
Desert tile Sanity   travel cost -5.
 | 
| Source | 
Refill a stack at the ship, certain rest spots, or purchasing from traders and villages.
 | 
| Value | 
0 (1 if buying)
 | 
| Stack size | 
20
 |