No need to toss your dish sponge. These replaceable heads go on in a snap to keep you scrub-happy at the sink. One to use now, one for later. Material: Bonterra™ plant plastic, cellulose, recycled plastic. There's some scary statistics out there about the nastiness associated with sponges. Have no fear, our plant-based sponge can be disinfected and contains no triclosan. Dishwasher Safe. Replaceable heads for Suds Up dish sponge. Extends your dish sponge use while minimizing waste.