Dr Thunder
Dr. Thunder is a brand of soda produced by Wal-Mart stores and canned in Bentonville, Arkansas, United States. It is an imitation of Dr Pepper, has a similar name and arguably a similar taste. There is also a diet version of Dr. Thunder.
Dr. Thunder was originally called "Southern Lightning," but the name was changed to reflect the striking similarities to Dr Pepper. The label of Dr. Thunder has recently been redesigned to say that " You've never been deep, until you've been Dr. Thunder deep."
Dr. Thunder is often considered a "mirror soda" to another Wal-Mart brand, Mountain Lightning.
Other chains have also launched a Dr Pepper-like soda, for example "Dr. Bob" which can be found at Tops Friendly Markets. Also Dr. K at Kroger. Safeway Inc. offers "Dr. Skipper" as its generic prune-flavored soda.