This Easy-To-Grow Mushroom Garden is the fruit of Valez and Arora's labor.
I recently went to Emeryville, just across the Bay Bridge from San Francisco, to see how the BTTR (pronounced "better") program works.
BTTR provides six nearby Peet's cafes with a dedicated bin for the grounds, and the baristas simply dump each day's spent beans and filters in their BTTR bin, waiting for the next morning's pickup.
The beans are then transported to a warehouse to be used as the basis of miniature mushroom farms, which are then sold to consumers.
For Valez and Arora, these grounds serve as the foundation for their business. For Peet's, it's a way to save a little on waste disposal charges, which can run up to hundreds of dollars each month, while contributing to creative reuse of what would otherwise be trash.