Perhaps LE already has a container; perhaps a large trash can already that we might not even know about.
What IF it was really dark outside, she emptied out the container, of which, is not hot to the touch, but just normal in temperature. She drives to the area where she plans to dump the container and it is dark outside. She empties the container, doesn't smell anything with regards to decomp as she is drunk. Leaves the area, dumps the container somewhere OR even brings it home.
Perhaps residue from the charred remains are still in the container, the residue is on the rug that might appear to be burned etc., etc.
Anything is possible.