Jamba Juice offers buy-one-get-one-free smoothies

Save on smoothies!

The smoothie started out as a niche drink sipped only by hippies and health nuts. But now smoothies are so mainstream they've started selling them at McDonald's. (Interesting that McD's ad campaign really pushes the idea that the drinks are "real fruit" smoothies--as if we'd expect a smoothie to be made from anything else, except that consumers are skeptical any time McDonald's food attempts to be remotely healthy.)

This week, Jamba Juice, the national chain that pioneered smoothie popularization, is offering buy-one-get-one-free drinks--just in time to start stocking up on vitamins to ward off the ills of cold and flu season. Here's how to get your free drink:

When you buy one smoothie, just present a printout of this coupon or show it on your phone through September 22 and you'll get any drink of equal or lesser value for free. And let us know how you think they stack up against the ones from McDonald's.