We have quite a few different teethers - types, shapes, chillable, etc. These are by FAR my baby's favorite teethers. We have two of the dinosaurs and one elephant. She likes them all, but it seems the dinosaurs are her favorite shapes. I think she can really reach the sore spots on her gums with the dinosaur tail and/or head. The elephant is a little more rounded and can't quite get to those same places (I assume). However, the flexibility of the material is highly preferred also (again assuming). She is always very contently chewing on these teethers. Not always on other teethers. Plus, the attached clip is extremely helpful to avoid teethers ending up on the floor or ground and needing to be washed right away. Easy to hold for baby, as well! Favorites.