are you serious....the trunk is a mini ice chest...liner and ice....for real you didnt know that...pfft
But the water increases the surface area of currently cold item against surface area of potentially cold items. So, a little water is good. Or you can put anti-slosh fuel cell foam to stop the sloshing. Tried that on the Venture Royale, luckily I had the saddle bags that opened from the top versus the bags that opened from the side.
It never occurred to me....I was working about a mile from the Sun in AZ, and ice there has a shorter life than quarks.
I totally agree if you're looking at an all day type of pit vehicle usage versus after race activities which usually involve more enthusiastic riding of pit vehicles and more enthusiastic consumption of beverages