My wife and I have used a butter keeper for almost a year now. The only time I use a non-butter produce is on my corn-on-the-cob. (Sweet corn with sweet butter is too much for me.) This butter keeper keeps the butter from go rancid while at room temperature.

The butter will stay good for about 30 days. This is because of the design of the keeper. You put about four ounces of water into the cup and then take the cup of butter and place it upside down in the cup of water. This makes a seal keeping the butter fresh at room temperature. I have only one complaint. It is not big enough. It hold one stick of butter. I fill it about once a week.

I don’t think I will ever switch back to a Margarine type product. Just for some background information about Margarine.