By Renee Lorenz Special to OnMilwaukee.com Published Apr 21, 2011 at 3:39 PM

Looking for a way to go green and save on your morning cup of joe?

Celebrate Earth Day with Starbucks tomorrow and get a free cup of coffee, just by bringing in your own reusable mug or tumbler.

Starbucks is offering the promotion throughout Friday, April 22 at all of its locations. If you don't have a mug or tumbler to bring in, they're also selling theirs in-store for 20 percent off.

Not a java fan? You can still get a mug of tea, hot or iced, for the same low price of nothing.

Renee Lorenz Special to OnMilwaukee.com

Contrary to her natural state of being, Renee Lorenz is a total optimist when it comes to Milwaukee. Since beginning her career with OnMilwaukee.com, her occasional forays into the awesomeness that is the Brew City have turned into an overwhelming desire to discover anything and everything that's new, fun or just ... "different."

Expect her random musings to cover both the new and "new-to-her" aspects of Miltown goings-on, in addition to periodically straying completely off-topic, which usually manifests itself in the form of an obscure movie reference.