Today in 2006, US Patent 7028505 B2 was issued, an invention of Clement Albert Maus, for his “Cooling Device For Beer Pitcher.” Here’s the Abstract:

A beverage chiller device for a serving pitcher has a lower stainless steel cylinder and an upper food-grade plastic sleeve. The upper end of the device is open to receive ice. A flexible strap attached onto the upper sleeve has a free end that can pass through a handle of the serving pitcher, with the lower end of the device immersed in the beverage and situated at a base of said pitcher. The flexible strap forms a closed loop that secures the chiller device to the serving pitcher. The flexible strap also permits the chiller device to pivot when the pitcher is tipped for pouring, so that the device remains more or less erect, and so meltwater does not pour out of the chiller device when the customer is pouring a drink from the pitcher. The flexible strap allows the stainless steel cylinder to drop down to the base of the pitcher, so the cylinder remains immersed in the beverage at the bottom of the pitcher.