The eegl Beer Growler is an affordable 64 oz. drink carrier that does what it's supposed to, and leaves out the frills. Many growlers like this can be much more expensive, with hardly any deference in quality or materials.
The growler will keep your beer cold for up to 24 hours, and if you want to use the growler as a thermos, you can; it'll keep drinks piping hot for up to 12 hours.
It's BPA-free, stainless steel, vacuum insulated, and it won't sweat. Perfect for the beach or the mountains. And for only $30, it's a steal.