The item ID for Stillsuit in Subnautica is:
stillsuit
Reclaims moisture from the body and provides clean, drinkable water.
The spawn code for this item is:
spawn stillsuit
The item command will add this item to your character's inventory. The item command for Stillsuit is:
item stillsuit
To unlock this item, use the following command:
unlock stillsuit
If you wish to lock this blueprint, after having unlocked it, use the following command:
lock stillsuit