Constructed of compressed cellulous this sponge is a sustainable and eco-friendly alternative to traditional sponges. The Expand-It Sponge is reusable, sustainable, and biodegradable. These sponges are not only highly absorbent, but are also durable and long-lasting. Digital full color imprint included in price. We recommend rinsing before use. Dishwasher safe and washing machine safe. FDA compliant ink. The flower shape is great for schools, green houses, and floral shops.