Beer Growlers by bike.
Sure, it would be easy to just carry them in panniers or mesh bags… but for the heck of it, I made some minimal webbing-and-elastic structures custom fit to Speakeasy growlers, and which clip to a rack with three-point restraint so they don’t bounce around. Started a few weeks ago, but finally found time to finish (and test!) them.
People at the brewery were amused. And the coffee porter made it to a friend’s party without getting too shaken up.