Here is an exerpt I just found in a WonderLabs.com advertisement.
Some younger people here might have this commercially available product that SUCKS. Jim ###
Liquid Filled Teething Rings Recalled.
Liquid Filled Teething Rings The U.S. Food and Drug Administration (FDA) is advising consumers to stop using liquid-filled children's teething rings manufactured by RC2 Brands (The First Years) because the liquid contained in these rings is contaminated with bacteria that may cause serious illness if swallowed by babies, enters the lungs, or is absorbed through a cut in the mouth.