What length is it?
I'm thinking maybe a rev carrier...
~28.4 inches assuming it is the Coleman C018 Soft Can Cooler Sleeve (which it appears to be) meant to carry 6 cans.
Yep that is the one. Clearance on Coleman's website and rei too... Mine from rei happens to have the shoulder strap sewn on backwards so the triglide adjuster lies against your shoulder as opposed to being on the outside....
Doesn't the travel frame get about that size? Probably able to carry one in there width wise.... And the insulation provided passing too.