What is this charcoal canister behind the passenger rear wheel well?

[Gunnersmate]

What is the Canister located in the Rear of the Rear Wheel Well and behind the Tailight of the Passenger side of a 2004 Jeep TJ 4.0 is this a Charcoal Canister

 

[jjvw]

'tis

 

[phacor8]

EVAP canister, yes

 

[Gunnersmate]

Thanks that helped find it in my service manual.

FWIW it is a leak detection pump and filter according to the Jeep Service Manual

 

[Jodh]

Portable water filter or emergency bbq grill

 

[nathanotis]

I pee in mine on the trails. Tread Lightly.