A handful of progressive wine makers have figured out what kindergartners have known all along: Drinks can be great when they come in a juicebox.

In yoga, the concept of ahimsa instructs us to “do no harm”—not to ourselves, not to others, and not to the planet. Last Wednesday, Lime.com reviewed several yoga mats that take kindness to our environment seriously, either through nontoxic manufacturing, sustainable and biodegradable materials, or both. Today, we look at the yoga mat's popular companion—the block, in search of the same eco-friendliness.