Anthony Stoneware French Butter Keeper, French Blue Artisan pottery, handmade in the mountains of North Carolina Lead-free glaze, available in a variety of colors; microwave and dishwasher safe Pack softened butter in dish under lid, fill base 1/3 full with water Invert lid and place on base; water rises against butter to create an airtight seal 5 x 3.25 inches (DxH), 1/2-cup capacity; glaze color and size may vary somewhat