The SPIN Slow Feeder bowls, level- EASY, are a dynamic slow feed pet bowl that turns mealtime for your dog or cat into fun and interactive feeding. SPIN bowls encourage sniffing, licking, and problem-solving during meals, which naturally slow eating and prevent choking, bloating, and excessively fast eating. Each bowl has a multi-functional center puzzle element that can be adjusted in height to offer variation or flip it over to create a whole new option. Each bowl has four large anti-skid rings to provide high stability.
The rotatable parts can be locked or reversed to add variation
Food grade material
BPA-FREE 
Dishwasher safe (Top-Rack)
 
How many of these bowls do you have in the cupboard? Now all you need is one! as you can interchange the middle parts!!
 
Want to see it in action?
https://youtu.be/WlXKEt6iRrI