cans/crowlers international?

I've done this multiple times, especially cans, without any problems. I usually pack everything like I pack when I ship them (tape the crowlers and wrap them well). Curious why you would be concerned.

 

I have not flown with crowlers but I recently purchased 10 from Fieldwork while on vacation. Threw them in my trunk drove up a mountain, on a windy road in the heat (I have made same trip with RR growlers and had the lid blow off when I tried to open). Than packed them in my suitcase drove 10 hours home across the desert with temps in 110 plus. Mailed them Fed Ex on a day when the local temp was 115 and had no problems. Figure if they can take that kind of beating flying with them will be a piece of cake.