As a group of people that really knows how to enjoy a beer, or five, we’ve found quite a bit of utility for the growler. It’s not a bad thing to have a purpose built device for the transportation and sharing of beer, but having a few more features never really hurt a product in the long run. The Hydro Flask was primarily designed to keep beer chilled, carbonated and contained between destinations, but the double wall vacuum insulation works for plenty of other liquids, too. It works with water and coffee and lemonade and probably personally barrel-aged cocktails. You could argue you could use any growler for that, but glass and porcelain alternatives won’t keep cold beverages that way for 24 hours, or hot beverages that way for 12. You’re buying a new 64oz Thermos or water bottle that just so happens to be really, really good at transporting beer.