Free shake with purchase of same. Redemption Instructions Log in to view the redemption instructions for this offer. Participating locations include: SONIC 314 NJ-31 Flemington, NJ 08822 Phone: 908-788-0010 Map SONIC 3331 NJ-27 Franklin Township, NJ 08823 Phone: 732-951-8000 Map Sharing Options Share Offer Copy Link
