Prevents food from being pushed off the plate. Concave wall assists in guiding food onto the utensil. Secured to the plate with an internal groove. Small size fits plates with a diameter of 8-9 1/2. Large size fits plates with a diameter of 9-11. Dishwasher safe to 185?. Made in the USA of FDA approved material. Does not contain lead, latex, BPA, phthalates or polycarbonates.