Device found in the Desert

[Chainbreaker]

I'm trying to identify a device that was discovered in the Arizona desert, someone has found about a dozen of these over the years, scattered about, while walking their dog. It's entirely plastic except for the springs, pushing the plunger closes the threaded hole:

Thanks for taking a look.

 

[CRUSADER]

I think its a possibility but what were they doing in the desert?

don't you start, you should know better, .........it just happens.....

 

[Bigcypresshunter]

I think its a possibility but what were they doing in the desert?

don't you start, you should know better, .........it just happens.....