WARNING: This page is about a different car, the 2015 RAM 3500 HD and 2015 RAM 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Coolant Recovery/Overflow Bottle
Courtesy of CHRYSLER GROUP, LLC
The coolant recovery/overflow bottle (2) is mounted on the front of the radiator support and behind the grille. The coolant recovery/overflow bottle (2) is made of high temperature plastic.