Whoozit water Cosmic Teether made by Manhattan Toy. Combining a soft rattle with textured teething rings & a bright cheery Whoozit this Cosmic Teether is one of our all-time bestsellers. The rattle hidden inside Whoozit & the water oozing in the rings promote cause-&-effect learning so it’s a good all-round developmental toy. When baby’s teething put this in the fridge to give them some cool relief. 12.5 cm.