Ant spit

Ant Spit is a luminous green goo thrown at the player by Giant Ant Queens. Although it is seen to have a value it can not be picked up by the player. When hit by the Ant Spit a small amount of Radiation damage is also inflicted on the player. It has a wg of 0 and no value.

If you have fast reflexes, you can "catch" the ant spit before it hits and damages you. It won't appear in your inventory, though.