Yes, This is the one. I've been using mine for years. The little blue icepack is about
4"x6". It is plastic and sits right on top of the piece of burlap sack I have cut out for the playmate. You don't have to worry about water melting. It is ideal. After you are finish all you do empty the dirt and left over worms back in the wormbed. Wash it out and it is ready .