Handles expose all sides to the air and dry (and therefore shrink) much more quickly than the walls. Anything you can do to slow them down will produce a more even drying process.
Drying Ceramics Without Cracks
Anything ceramic ware can be dried if it is done slowly and evenly enough. To dry faster optimize the body recipe, ware cross section, drying process and develop a good test to rate drying performance.
In ceramics, handles need to be applied to many types of ware. There are things to know not just to make them look good, but to be strong, durable, practical.
During drying clays and porcelains shrink as they become rigid. When this occurs unevenly, cracks are the result.