I was reading an old thread about coolers that fit under the rear seats in the Challenger 180, and I thought I would share here with what I found since that old thread is now locked. I was looking for the maximum capacity cooler that would fit and I found one that exactly matches the compartment size, height and everything (on my 2009 at least). Here is the Amazon link (not a referral or endorsement or anything, it's just where I happened to buy it):
https://www.amazon.com/gp/product/B078SRR2GJ
The little door on the top can be especially convenient when it's stowed. There are a couple of reviews on Amazon talk about quality issues with the straps tearing but it seems pretty decently made to me for the short time I have had it, maybe they were having a manufacturing issue on these at that point in the past. Time will tell I guess.
https://www.amazon.com/gp/product/B078SRR2GJ
The little door on the top can be especially convenient when it's stowed. There are a couple of reviews on Amazon talk about quality issues with the straps tearing but it seems pretty decently made to me for the short time I have had it, maybe they were having a manufacturing issue on these at that point in the past. Time will tell I guess.