Old Guys Rule BottleKeeper - The Ultimate Beer Hugger And Insulator To Keep Your Beer Cooler! Colder Beer is Better. It's Science. Hate warm beer and broken bottles? Yeah, we did to. As a matter of fact, that's precisely why we partnered with BottleKeeper to bring you the ultimate beer hugger! The Old Guys Rule BottleKeeper comes in the original size and color, 12oz Standard Stainless, is lined with neoprene to keep your beer bottle colder, longer, and has the Old Guys Rule design in black.