This interesting item is a figural Sonic salt shaker. It is made of glazed & fired ceramic. The 2 holes at the top dispense the salt (Pepper shakers usually have 3 holes, not 2) and there is likely a plug at the bottom for re-filling.

It's a great idea to have a little figural shaker like this! Mini classic Sonic is perfect for such an application. This shaker is quite uncommon! Owned & photographed by John.