64oz Growler Caddy

I made this 64oz growler caddy to fit my Schwinn Deluxe Alloy Rear Rack to carry my cold press coffee. I have yet to carry beer but I (being an avid beer drinker) think that it will work just fine as long as don't try to bomb Mt. Everest and you let it rest before opening it. I've used it many times for coffee and never had a problem. I've wanted to remix it to include space for some rubber or velcro to give the growler some cushion, but haven't yet... As you can see in the picture all I use to