A crowler is a type of beer container that is similar to a growler, but is made out of aluminum instead of glass. Crowlers can be sealed and kept fresh for longer periods of time than growlers, making them a popular choice for people who want to take beer home from breweries or drink it on the go. However, because they are made out of metal, crowlers can become very cold if they are not stored properly. If you plan on drinking your crowler right away, there is no need to refrigerate it. However, if you want to keep your beer fresh for a longer period of time, it is best to store it in the fridge.