This is a follow-up to the previous cache, "Mightier than the sword" GC3Z8VJ and is in the same general area. This game has gone on for over 20 years and in that time nature has continued to grow, often covering up, destroying, or absorbing some caches that have since left our game's play field. When you find this one, you will see one such way nature not only provides good hiding spots, but also can reclaim what we've placed.
You're looking for a rain tube about 3 inches long.
Congratulations to Team Hugapug63 for the FTF!