The teardrop shape is my 6-month-old's favorite—she gnaws on the textured tip for ages. I also love that all three pieces go straight into the dishwasher, and the ring clips onto the stroller without fussing.
The ring clamps onto our stroller bar in seconds, and the three shapes are just weighty enough for tiny hands to grab and turn. I love that the whole thing goes straight into the dishwasher after a picnic. It's become the only toy that keeps my daughter occupied during grocery runs.