Le Creuset Stoneware Butter Crock, 6-Ounce, Palm;

Before refrigeration, butter stayed fresh when immersed in water. The stoneware butter crock from Le Creuset uses that same principle, keeping your butter spreadable at room temperature. To use, pack the cup on the underside of the lid with six ounces (about 1-1/2 sticks) of butter. Fill the crock one-third of the way up with cold water. Invert the lid/cup into the water and an air-tight seal is created. When you're ready to spread, open the lid and set it on its wide, flat knob. Change the water every few days for best results.