Two piece butter dish.
These handy butter dishes look great on the counter when they’re closed, and the top pulls out to sit on the table as well. Originating in France in the 1800’s before refrigeration was commonplace, they keep butter fresh by sealing it in water.
They come in two parts; the base holds the water, and the top holds the butter. The butter is packed into the top so it doesn’t fall out when flipped upside down and submerged in the water. This creates and airtight seal so the butter is not exposed to oxygen. Your butter can be left out on the counter and will remain easy to spread. Changing the water every few days ensures freshness.