The Zeal melamine double-walled insulated butter dish fits a standard 500g spreadable margarine tub or 1lb butter pack perfectly, and it looks great on the table. This kitchen gadget butter dish with a lid keeps the butter cooler on warmer days, and is handy, practical and durable. Proper real butter straight out of the refrigerator is hard and un-spreadable, but this insulated container keeps it at room temperature out on the surface in your kitchen ready to use, it will keep an even spreadable temperature all day, ideal when baking and cooking.