Thanks to long-time reader SM for sending along the latest juice-related news:

After stirring up competition in the coffee business, McDonald’s Corp. is now making its mark in smoothies, irking at least one high-end purveyor of fruit juice concoctions.

On Monday, the burger giant reported its highest monthly same-store sales gain since January 2009, thanks in part to sales of its new smoothies and other cold beverages.

Smoothie purveyor Jamba Juice Co. (sic; the proper spelling is “Jurmbuh Juice” –ed.) isn’t taking the smoothie assault lying down. The Emeryville, Calif., company has been running a fake ad on YouTube mocking the idea of a burger chain getting into the business of smoothies.

SCORCHED EARTH