The Joseph Joseph™Smasher™ Pump-Action Potato Masher was designed to speed up the mashing process, the Smasher cups and traps the potato firmly in place while its unique pump-action makes short work of the mashing. Also perfect for puréeing other kinds of cooked vegetables and soft fruits. The strong pump-action returns the mashing plate to the top position and helps decrease the mashing process time. This product is dishwasher safe.