US Patent 7820256 Stirring rod

The invention relates to a rod, particularly a stirring rod for liquids, said stirring rod comprising a hollow structure, which is made of transparent material and the interior of which is filled with liquid and/or gas, and in which is present at least one solid body, at least one other solid body forming a hollow space being provided in the hollow structure of the rod instead of or in addition to the solid bodies, and other solid bodies being located inside the hollow space of the body.