After trying to haul a small mower this summer and spilling a little gas, I finally purchased the Weathertech Rear Cargo Liner that goes behind the 2nd Row Seats. The photos at their website show turned-up edges that supposedly trap a gallon of milk if it spills in that area (if you watch their demo videos) -- but when I put mine in it just lays there mostly flat. I try to curl the edges upward into position, but since the fit is not very snug the sidewalls of the cargo area do not help (there's about a two-inch gap on both sides) -- except at the extreme rear behind the 3rd row of seats.
The length is okay, but the sidewall-to-sidewall fit leaves a lot to be desired, for being a "laser-fit design".
Are you experiencing the same thing?