Tovolo Collapsible Stopper and Strainer - Spring Green Exactly like the name states, a durable Tovolo Collapsible Stopper & Strainer is just what the plumber recommends A turn of the knob drops the stopper down and prevents liquid from draining Another turn and the stopper stays up, allowing water to drain but food particles to collect You can discard food easily with the handy knob and then collapse it down for easy storage This Collapsible Stopper and Strainer is BPA free and dishwasher safe