GyroBite Plate (Modern & catchy)

One-Option:
• GyroBowl

Two Options:
• SaturnSpin Bowl
• SpinSafe Dish
• GyroPlate 360
• TwistStay Bowl

Best All-Around:
SaturnSpin Bowl (most unique and memorable, directly references the planet design) or SpinSafe Dish (clearest on function).

Suggested product listing title:
"SaturnSpin Bowl - 360° Rotating Spill-Proof Kids Plate with Lid, 3 Handles, BPA-Free"