Here's some information for shopping:
Capacity:
It holds 18 spice jars, typically made of glass, allowing for storage of various seasonings.
Design:
The rotating Ferris wheel or tower design allows for easy access to all spices and helps save counter space.
Convenience:
The jars are often designed for easy, one-handed operation and are typically easy to clean.
Versatility:
Beyond spices, these racks can also be used to store other small items like dried fruits or scented teas.