I usually get growler fills from local breweries. However, I've purchased two crowlers over past year from two different breweries. Both have leaked around the lid seal and have gone flat as well as sticking to my refrigerator shelf due to the leaking beer.
Is this an inherent problem with crowlers, or is this due to operator error? Is there a way to check for this at the brewery before leaving, like turning it upside-down on the bar to see if it leaks?