Stainless Steel Whisking Ball Single Pack Create Your Own Whisking Bottler/Whisk Ball Will work in ANY bottle, not just mason jars. Single, Double or Triple Packs Create your own Mason Jar shaker bottle! Great for your post work out recovery drink, or liquid lunch on the go! Great for other kitchen tasks, such as mixing up gravy or pudding, too! It measures about 2.2"x2.2".