Bamboo Studio 7 Square Inch Bowl, 16-Ounce, 8-Pack, Natural Color Includes 8 of our 7-inch square bowls We use the outer bark or "sheath" of the bamboo plant, the sheath is collected, steamed, and pressed into shape No dyes are used to alter the color, the bamboo is as close to it's natural form as possible Microwave safe, disposable, may hand wash for extended uses (do not submerge in water), dry immediately after washing Please note that our bowls are measured from edge to edge, there is a lip on the bowls so please take this into account when deciding on size